213 results match your criteria Astigmatism Astigmatic Keratotomy


Comparison of penetrating femtosecond laser-assisted astigmatic keratotomy and toric intraocular lens implantation for correction of astigmatism in cataract surgery.

Sci Rep 2021 Apr 1;11(1):7340. Epub 2021 Apr 1.

Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-Ro, Gangnam-gu, Seoul, 06351, Republic of Korea.

This study tried to compare the clinical outcomes of femtosecond laser-assisted astigmatic keratotomy (FSAK) and toric intraocular lens (IOL) implantation for astigmatism correction and identify factors affecting the efficacy of FSAK and toric IOL implantation in astigmatism correction. This retrospective case series comprised patients with corneal astigmatism ranging between 0.5 D and 4. Read More

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Precision and refractive predictability of a new nomogram for femtosecond laser-assisted corneal arcuate incisions.

Acta Ophthalmol 2021 Feb 24. Epub 2021 Feb 24.

Department of Ophthalmology and Optometry, Kepler University Hospital GmbH, Johannes Kepler University Linz, Linz, Austria.

Purpose: Validating a new nomogram for low to moderate astigmatism (0.75 D to 2.5 D) correction with epithelium- and Bowman-penetrating femtosecond laser-assisted arcuate incisions. Read More

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February 2021

Evaluation of Astigmatic Correction Using Vector Analysis after Combined Femtosecond Laser-Assisted Phacoemulsification and Intrastromal Arcuate Keratotomy.

J Ophthalmol 2021 29;2021:2860840. Epub 2021 Jan 29.

Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea.

The aim of this study was to evaluate astigmatic correction in patients with mild to moderate astigmatism after combined femtosecond laser-assisted cataract surgery (FLACS) and intrastromal arcuate keratotomy (ISAK), using vector analysis. This retrospective study included patients with corneal astigmatism of 0.5-3. Read More

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January 2021

Two-year outcomes after full-thickness astigmatic keratotomy combined with small-incision lenticule extraction for high astigmatism.

BMC Ophthalmol 2021 Jan 9;21(1):23. Epub 2021 Jan 9.

Onnuri Eye Hospital, 325, Baekje-daero, Wansan-gu, Jeonju-si, Jeollabuk-do, Republic of Korea.

Background: To evaluate clinical outcomes after full-thickness astigmatic keratotomy (FTAK) combined with small-incision lenticule extraction (SMILE) in eyes with high astigmatism.

Methods: This study comprised 75 eyes of 43 patients with over 4.0 diopters (D) of astigmatism who were treated with SMILE after FTAK. Read More

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January 2021

One-Year Results of Arcuate Keratotomy in Patients With Low to Moderate Corneal Astigmatism Using a Low-Pulse-Energy Femtosecond Laser.

Am J Ophthalmol 2021 04 9;224:53-65. Epub 2020 Dec 9.

Department of Ophthalmology, Medical University of Vienna, Vienna, Austria. Electronic address:

Purpose: To investigate corneal astigmatism (CA) reduction and corneal optical quality after surface-penetrating femtosecond laser arcuate keratotomies (Femto AK) considering anterior (CA) and posterior corneal curvature (CA), total corneal refractive power astigmatism (CA), and corneal higher-order aberrations (HOAs) through 1 year.

Design: Prospective interventional case series.

Methods: Setting: Department of Ophthalmology, Medical University of Vienna. Read More

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Comparison of manual and femtosecond astigmatic keratotomy in the treatment of postkeratoplasty astigmatism.

Acta Ophthalmol 2020 Oct 30. Epub 2020 Oct 30.

Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON, Canada.

Purpose: To compare the outcomes of femtosecond astigmatic keratotomy (FSAK) and manual astigmatic keratotomy (AK) in treatment of postkeratoplasty astigmatism.

Methods: A retrospective, comparative, pairwise-matched case series including 150 patients who underwent either FSAK (n = 75) or manual AK (n = 75) for the treatment of astigmatism (>3.00 D) following penetrating keratoplasty or deep anterior lamellar keratoplasty. Read More

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October 2020

Factors Associated With Improvement in Vision Following Femtosecond Astigmatic Keratotomy in Post-Keratoplasty Keratoconus Patients.

Am J Ophthalmol 2020 11 20;219:59-65. Epub 2020 Jun 20.

Department of Ophthalmology and Vision Sciences, The University of Toronto, Toronto, Ontario, Canada.

Purpose: To evaluate factors associated with improvement in vision following femtosecond astigmatic keratotomy (FSAK) in patients with keratoconus post-keratoplasty.

Design: Retrospective, interventional case series.

Methods: The study took place in an institutional setting. Read More

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November 2020

Five-Year Changes in Corneal Astigmatism After Combined Femtosecond-Assisted Phacoemulsification and Arcuate Keratotomy.

Am J Ophthalmol 2020 09 11;217:232-239. Epub 2020 May 11.

Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong; Hong Kong Laser Eye Centre, Hong Kong. Electronic address:

Purpose: To investigate the long-term stability of corneal astigmatism after combined femtosecond (fs)-assisted phacoemulsification and arcuate keratotomy.

Design: Retrospective, interventional case series.

Methods: Surgery was performed using a Victus (Bausch & Lomb) platform. Read More

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September 2020

Astigmatic Outcomes of Single, Non-Paired Intrastromal Limbal Relaxing Incisions During Femtosecond Laser-Assisted Cataract Surgery Based on a Custom Nomogram.

Clin Ophthalmol 2020 22;14:1059-1070. Epub 2020 Apr 22.

William Osler Health System, Brampton L6R 3J7, Canada.

Purpose: To determine astigmatic changes of intrastromal limbal-relaxing incisions (LRIs) performed during femtosecond laser-assisted cataract surgery (FLACS).

Design: Retrospective case series.

Patients and methods: Patients undergoing FLACS with adjunctive astigmatism management with intrastromal LRIs were included. Read More

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[Femtosecond laser-assisted astigmatic keratotomy].

Ophthalmologe 2020 May;117(5):415-423

Augenklinik Dardenne, Friedrich-Ebert-Str. 23-25, 53177, Bonn, Deutschland.

Background: For more than 100 years keratotomy has been in the focus of ophthalmology as a treatment option for correction of astigmatism. Femtosecond laser technology provides a new level of precision, standardization and control as well as completely new options, such as purely intrastromal incisions.

Method: The current literature is summarized with respect to femtosecond laser-assisted astigmatic keratotomy (FSAK) in combination with cataract surgery, where less astigmatic correction is necessary as well as after corneal surgery, such as perforating keratoplasty, where higher astigmatic errors need to be corrected. Read More

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Femtosecond-Assisted Elliptical LASIK Flap for the Correction of Post-Arcuate Keratotomy Residual Astigmatism.

Case Rep Ophthalmol 2019 Sep-Dec;10(3):379-383. Epub 2019 Nov 13.

Department of Ophthalmology, University of Lausanne, Jules-Gonin Eye Hospital, Fondation Asile des aveugles, Lausanne, Switzerland.

We report the application of an elliptical femtosecond laser-assisted in situ keratomileusis (LASIK) flap for the management of post-arcuate keratotomy (AK) residual astigmatism. An 82-year-old male was referred to our institute for evaluation of his right eye due to residual regular astigmatism 1 year after AK. On examination, uncorrected distance visual acuity (UDVA) was 20/50 and corrected distance visual acuity was 20/25 (+3. Read More

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November 2019

Stepwise Combination of Femtosecond Astigmatic Keratotomy With Phacoemulsification and Toric Intraocular Lens Implantation in Treatment of Very High Postkeratoplasty Astigmatism.

Cornea 2020 Jan;39(1):71-76

The University of Toronto, Department of Ophthalmology and Vision Sciences, Toronto, Canada; and.

Purpose: To report the outcomes of stepwise combined femtosecond astigmatic keratotomy (FSAK) and phacoemulsification with toric intraocular lens (IOL) implantation in the treatment of very high astigmatism after either penetrating keratoplasty or deep anterior lamellar keratoplasty.

Methods: This is a retrospective, interventional case series including 8 eyes of 6 patients with very high astigmatism [≥8.00 diopter (D)] after either penetrating keratoplasty or deep anterior lamellar keratoplasty who underwent FSAK, followed by phacoemulsification and toric IOL implantation. Read More

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January 2020

[Comparison of Toric intraocular lenses and corneal incisional procedures for correction of low and moderate astigmatism during cataract surgery: A meta-analysis].

Zhonghua Yan Ke Za Zhi 2019 Jul;55(7):522-530

Department of Ophthalmology, Affiliated Hospital of North Sichuan Medical College, Department of Ophthalmology and Optometry, North Sichuan Medical College, Nanchong 637000, China.

To systematically compare the effects of Toric intraocular lens (IOL) implantation and corneal incisional procedures on the correction of astigmatism during cataract surgery. A peer-reviewed literature search was implemented in MEDLINE, EMBASE, EBSCO, ScienceDirect, Trip Database, Ovid, and the Chinese databases including CNKI and Wanfang Data. The inclusion criteria were randomized controlled trials (RCTs) that compared the Toric IOL implantation and the corneal incisional procedures to correct low and moderate astigmatism during cataract surgery. Read More

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Vector Analysis of Femtosecond Laser-Assisted Arcuate Keratotomy for Post-Keratoplasty Astigmatic Correction.

Ophthalmic Res 2019 5;62(3):150-156. Epub 2019 Jun 5.

Department of Ophthalmology, Faculty of Medicine, Cairo University, Cairo, Egypt.

Purpose: To study the astigmatic correction of high post-keratoplasty astigmatism using Femtosecond laser (FSL)-assisted Arcuate Keratotomy (FS-AK).

Methods: A prospective interventional cohort study. We enrolled 17 eyes with high degree of irregular astigmatism, scheduled for FS-AK. Read More

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November 2019

Utilizing intraoperative aberrometry and digital eye tracking to develop a novel nomogram for manual astigmatic keratotomy to effectively decrease mild astigmatism during cataract surgery.

Taiwan J Ophthalmol 2019 Jan-Mar;9(1):27-32

Taipei Nobel Eye Clinic, Taipei, Taiwan.

Purpose: The purpose of the study is to develop a novel nomogram and validate with a retrospective comparative study for manual astigmatic keratotomy (MAK) with the assistance of intraoperative aberrometry (Optiwave Refractive Analysis [ORA]) and digital eye tracking (VERION) in mild astigmatic correction enhancement.

Setting: The study was conducted in Honolulu, Hawaii.

Design: This was a single-surgeon comparative study with retrospective data collection. Read More

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Effects of astigmatic keratotomy combined with scleral tunnel incisions for the treatment of high astigmatism after penetrating keratoplasty.

Exp Ther Med 2019 Jan 14;17(1):495-501. Epub 2018 Nov 14.

Department of Ophthalmology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, P.R. China.

The present study aimed to evaluate the efficacy, predictability and safety of astigmatic keratotomy (AK) combined with scleral tunnel incisions in the treatment of high astigmatism after penetrating keratoplasty (PKP). Paired AK combined with scleral tunnel incisions was performed at the steep astigmatic meridian in 8 eyes of 8 patients with high keratometric astigmatism [>5.0 diopters (D)] after PKP. Read More

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January 2019

Femtosecond laser-assisted cataract surgery versus conventional phacoemulsification: Refractive and aberrometric outcomes with a diffractive multifocal intraocular lens.

J Cataract Refract Surg 2019 01 10;45(1):21-27. Epub 2018 Nov 10.

Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea. Electronic address:

Purpose: To compare the outcomes of conventional phacoemulsification and femtosecond laser-assisted cataract surgery followed by multifocal intraocular lens (IOL) implantation.

Setting: Asan Medical Center, Seoul, South Korea.

Design: Retrospective case series. Read More

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January 2019

Evaluation of the effectiveness of combined femtosecond laser-assisted cataract surgery and femtosecond laser astigmatic keratotomy in improving post-operative visual outcomes.

BMC Ophthalmol 2018 Jul 3;18(1):161. Epub 2018 Jul 3.

Department of Ophthalmology, the Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University,The Key Lenticular Laboratory of Liaoning Province, Shenyang, 110005, China.

Background: To determine postoperative refractive and visual outcomes and astigmatic changes after femtosecond laser astigmatic keratotomy in femtosecond laser-assisted cataract surgery (FLACS).

Methods: This was a prospective interventional case series. Patients with age-related cataract and corneal astigmatism (1. Read More

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Circular Keratotomy Combined With Wedge Resection in the Management of High Astigmatism After Penetrating Keratoplasty.

Eye Contact Lens 2018 Nov;44 Suppl 2:S392-S395

Department of Ophthalmology (H.Ç.), Türkiye Hospital, Eye Clinic, İstanbul, Turkey; Department of Ophthalmology (S.G.), Prof. Dr. N. Reşat Belger Beyoğlu Eye Training and Research Hospital, İstanbul, Turkey; and Department of Ophthalmology (E.G.), Medipol University Medical School, İstanbul, Turkey.

Objective: To evaluate the effectiveness of circular keratotomy combined with wedge resection for the management of high astigmatism after penetrating keratoplasty (PK).

Methods: The study included seven eyes of seven patients with previous PK who underwent circular keratotomy combined with wedge resection. The uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), spherical equivalent (SE) refraction, and keratometric powers obtained by corneal topography were evaluated. Read More

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November 2018

Topography-guided transepithelial photorefractive keratectomy to correct irregular refractive errors after radial keratotomy.

J Cataract Refract Surg 2018 Mar 30;44(3):274-279. Epub 2018 Mar 30.

From the Department of Ophthalmology (Ghoreishi, Peyman, Koosha, Golabchi, Pourazizi), Isfahan University of Medical Sciences and the Department of Research and Development (Ghoreishi), Parsian Clinic of Ophthalmology, Isfahan, Iran.

Purpose: To evaluate the efficacy and safety of topography-guided transepithelial photorefractive keratectomy (PRK) in a group of patients with post-radial keratotomy (RK) showing irregular corneas.

Setting: Feiz University Hospital, Isfahan, Iran.

Design: Prospective case series. Read More

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Astigmatic correction by intrastromal astigmatic keratotomy during femtosecond laser-assisted cataract surgery: Factors in outcomes.

J Cataract Refract Surg 2018 Feb;44(2):202-208

From the Department of Ophthalmology and Visual Science, College of Medicine, Seoul St. Mary's Hospital, Catholic University of Korea, and the Catholic Institute of Visual Science, Catholic University of Korea, Seoul, South Korea. Electronic address:

Purpose: To evaluate the 6-month outcomes of femtosecond laser astigmatic keratotomy (AK) combined with femtosecond laser-assisted cataract surgery and identify factors affecting the efficacy of astigmatic correction.

Setting: Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, South Korea. Read More

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February 2018

Femtosecond laser-assisted astigmatic keratotomy: a review.

Authors:
John S M Chang

Eye Vis (Lond) 2018 12;5. Epub 2018 Mar 12.

Department of Ophthalmology, Hong Kong Sanatorium & Hospital, 8/F, Li Shu Pui Block, Phase II, 2 Village Road, Happy Valley, Hong Kong.

Background: Astigmatic keratotomy (AK) remains an accessible means to correct surgically induced or naturally occurring astigmatism. The advantages of femtosecond laser-assisted astigmatic keratotomy (FSAK) over conventional methods have been recognized recently.

Main Text: This review evaluates the efficacy, complications, and different methods of FSAK for correction of astigmatism in native eyes and those that underwent previous penetrating keratoplasty (PKP). Read More

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Effectiveness and confounding factors of penetrating astigmatic keratotomy in clinical practice: Case report.

Medicine (Baltimore) 2018 Jan;97(4):e9709

Department of Ophthalmology, Taipei City Hospital, Renai Branch, Taipei, Taiwan.

Rationale: Penetrating astigmatic keratotomy (penetrating AK) is a well-known method to correct corneal astigmatism but rarely be performed nowadays. This article reevaluated the clinical effectiveness and confounding factors of penetrating AK.

Patient Concerns: Penetrating AK has been introduced to serve as one alternative operation for astigmatism correction, and is thought to have the potential advantage of being more affordable and easy to perform. Read More

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January 2018

Vector analysis of femtosecond laser-assisted astigmatic keratotomy after deep anterior lamellar keratoplasty and penetrating keratoplasty.

Int Ophthalmol 2019 Jan 22;39(1):189-198. Epub 2017 Dec 22.

Dhahran Eye Specialist Hospital, P.O. Box: 39455, Dhahran, Eastern Province, 31942, Saudi Arabia.

Purpose: To compare the refractive and keratometric changes induced by femtosecond laser astigmatic keratotomy (AK) for suture-out post-keratoplasty astigmatism in deep anterior lamellar keratoplasty (group I) and penetrating keratoplasty (group II).

Setting: Dhahran Eye Specialist Hospital, Dhahran, Saudi Arabia.

Design: Retrospective, comparative, interventional study. Read More

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January 2019

Post-keratoplasty astigmatism management by relaxing incisions: a systematic review.

Eye Vis (Lond) 2017 6;4:29. Epub 2017 Dec 6.

Ophthalmology Department, Aix-Marseille University - APHM, Hôpital de la Timone, 264 rue Saint Pierre, 13 385 Marseille Cedex 5, France.

Postoperative visual acuity can be limited by post-keratoplasty astigmatism, even with a clear corneal graft. Astigmatism management can be performed by selective suture removal, adjustment of sutures, optical correction, photorefractive procedures, wedge resection, intra-ocular lens implantation, intracorneal ring segments, relaxing incisions with or without compression sutures and repeated keratoplasty. Relaxing incisions can be made in the graft, graft-host interface or host cornea. Read More

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December 2017

A novel nomogram for the treatment of astigmatism with femtosecond-laser arcuate incisions at the time of cataract surgery.

Clin Ophthalmol 2017 13;11:1841-1848. Epub 2017 Oct 13.

Massachusetts Eye and Ear Infirmary.

Purpose: The purpose of this study was to determine an arcuate incision (AI) nomogram to treat astigmatism during femtosecond laser-assisted cataract surgery.

Methods: This is a retrospective, cohort study. Femtosecond laser (FSL)-assisted transepithelial AIs were created at a 9. Read More

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October 2017

Comparison between toric and spherical phakic intraocular lenses combined with astigmatic keratotomy for high myopic astigmatism.

Eye Vis (Lond) 2017 18;4:20. Epub 2017 Aug 18.

The Eye Hospital of Wenzhou Medical University, 270 Xueyuan West Road, Wenzhou, 325000 Zhejiang People's Republic of China.

Background: To compare the outcomes of a toric phakic intraocular lens (PIOL) and a spherical PIOL combined with astigmatic keratotomy (AK) for the correction of high myopic astigmatism.

Methods: This study enrolled patients with high myopic astigmatism, including 30 eyes (22 patients) that received a toric PIOL implantation (TICL group), and 32 eyes (24 patients) that received combined AK and a spherical PIOL implantation (AK+ ICL group). The outcomes were compared between the two groups before surgery, and at the following time points after surgery: 1 week, 1, 3, 6 months, and 1, 2 years. Read More

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A numerical-experimental protocol to characterize corneal tissue with an application to predict astigmatic keratotomy surgery.

J Mech Behav Biomed Mater 2017 10 15;74:304-314. Epub 2017 Jun 15.

Applied Mechanics and Bioengineering (AMB), Aragón Institute of Engineering Research (i3A), University of Zaragoza, Zaragoza, Spain; Centro de Investigación Biomédica en Red: Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza, Spain.

Tonometers are intended to determine the intraocular pressure (IOP) and the quality of corneal tissue. In contrast to the physiological state of stress of the cornea, tonometers induce non-physiological bending stress. Recently, the use of a single experiment to calibrate a set of corneal mechanical properties was suggested to be an ill-posed problem. Read More

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October 2017

Guiding flying-spot laser transepithelial phototherapeutic keratectomy with optical coherence tomography.

J Cataract Refract Surg 2017 04;43(4):525-536

From the Center for Ophthalmic Optics and Lasers (Li, Yokogawa, Tang, Chamberlain, Zhang, Huang), Casey Eye Institute and Department of Ophthalmology, Oregon Health and Science University, Portland, Oregon, USA; and the Department of Ophthalmology (Yokogawa), Kanazawa University Graduate School of Medical Science, Kanazawa, Japan. Electronic address:

Purpose: To analyze transepithelial phototherapeutic keratectomy (PTK) results using optical coherence tomography (OCT) and develop a model to guide the laser dioptric and depth settings.

Setting: Casey Eye Institute, Portland, Oregon, USA.

Design: Prospective nonrandomized case series. Read More

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Femtosecond laser arcuate keratotomy for the correction of postkeratoplasty high astigmatism in keratoconus.

J Res Med Sci 2017 16;22:17. Epub 2017 Feb 16.

Isfahan Eye Research Center, Feiz Hospital, Isfahan University of Medical Sciences, Isfahan, Iran.

Background: Astigmatism is the leading complication in visual recovery after penetrating keratoplasty (PKP) and deep anterior lamellar keratoplasty (DALK); in this study, we evaluated the outcome of femtosecond laser arcuate keratotomy (FLAK) after DALK and PKP in Iranian keratoconic patients.

Materials And Methods: In this prospective interventional case series, refractive and keratometric predictability, efficacy, and complications of FLAK for postkeratoplasty astigmatism in keratoconus were evaluated; 23 eyes of 23 consecutive patients (mean age of 32.43 ± 9. Read More

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February 2017