Publications by authors named "Jeffrey C Kwong"

100Publications

Comprendre l’hétérogénéité pour guider la réponse de la santé publique à la COVID-19 au Canada.

CMAJ 2020 11;192(46):E1502-E1504

MAP Centre for Urban Health Solutions (Mishra), Institut du savoir Li Ka Shing, Hôpital St. Michael's, Réseau universitaire de santé de Toronto; Département de médecine (Mishra), Hôpital St. Michael's, Université de Toronto; Institut pour les politiques, la gestion et l'évaluation de la santé (Mishra), École Dalla Lana de santé publique, Université de Toronto; Institut de recherche en sciences cliniques (Kwong); Département de médecine familiale et communautaire (Kwong), Université de Toronto; École Dalla Lana de santé publique (Kwong), Université de Toronto; Division d'infectiologie (Chan), Département de médecine, Centre des sciences de la santé Sunnybrook; Division de la santé publique clinique et Institut pour les politiques, la gestion et l'évaluation de la santé (Chan), École Dalla Lana de santé publique, Université de Toronto, Toronto, Ont.; Département d'épidémiologie (Baral), Université Johns Hopkins, Baltimore, Md.; Institut du savoir Li Ka Shing (Baral), Hôpital St. Michael's, Toronto, Ont.

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November 2020

Heterogeneity in testing, diagnosis and outcome in SARS-CoV-2 infection across outbreak settings in the Greater Toronto Area, Canada: an observational study.

CMAJ Open 2020 Oct-Dec;8(4):E627-E636. Epub 2020 Oct 9.

MAP Centre for Urban Health Solutions (Wang, Ma, Yiu, Landsman, Luong, Hwang, Mishra), St. Michael's Hospital, University of Toronto; ICES (Calzavara, Kwong); Division of Infectious Diseases, Department of Medicine (Chan, Mishra), University of Toronto; Division of Infectious Diseases (Chan), Sunnybrook Health Sciences Centre, University of Toronto; Dalla Lana School of Public Health (Kustra), University of Toronto; Department of Family and Community Medicine (Kwong), Faculty of Medicine, University of Toronto, Toronto, Ont.; MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology (Boily), Faculty of Medicine, Imperial College, London, UK; Division of General Internal Medicine (Hwang), Department of Medicine, University of Toronto; Department of Medicine (Straus), St. Michael's Hospital, University of Toronto, Toronto, Ont.; Bloomberg School of Public Health (Baral), Johns Hopkins University, Baltimore, Md.

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October 2020

Assessing the completeness of infant and childhood immunizations within a provincial registry populated by parental reporting: A study using linked databases in Ontario, Canada.

Vaccine 2020 Jul 20;38(33):5223-5230. Epub 2020 Jun 20.

Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Department of Family and Community Medicine, University of Toronto, Toronto, Ontario, Canada; Toronto Western Family Health Team, University Health Network, Toronto, Ontario, Canada; North York General Hospital, Toronto, Ontario, Canada.

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July 2020

Understanding heterogeneity to inform the public health response to COVID-19 in Canada.

CMAJ 2020 06 3;192(25):E684-E685. Epub 2020 Jun 3.

MAP Centre for Urban Health Solutions (Mishra), Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto; Department of Medicine (Mishra), St. Michael's Hospital, University of Toronto; Institute of Health Policy, Management and Evaluation (Mishra), Dalla Lana School of Public Health, University of Toronto; ICES (Kwong); Department of Family and Community Medicine (Kwong), University of Toronto; Dalla Lana School of Public Health (Kwong), University of Toronto; Division of Infectious Diseases (Chan), Department of Medicine, Sunnybrook Health Sciences Centre; Division of Clinical Public Health, and Institute of Health Policy, Management and Evaluation (Chan), Dalla Lana School of Public Health, University of Toronto, Toronto, Ont.; Department of Epidemiology (Baral), Johns Hopkins University, Baltimore, Md.; Li Ka Shing Knowledge Institute (Baral), St. Michael's Hospital, Toronto, Ont.

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June 2020

Urban green space and the risks of dementia and stroke.

Environ Res 2020 07 17;186:109520. Epub 2020 Apr 17.

Department of Environmental and Occupational Health, Public Health Ontario, 480 University Ave. Suite 300, Toronto, ON, M5G 1V2, Canada; ICES, 2075 Bayview Ave. G1 06, Toronto, ON, M4N 3M5, Canada; Dalla Lana School of Public Health, University of Toronto, 155 College St. Room 500, Toronto, ON, M5T 3M7, Canada. Electronic address:

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July 2020

An international cohort study of birth outcomes associated with hospitalized acute respiratory infection during pregnancy.

J Infect 2020 Jul 20;81(1):48-56. Epub 2020 Apr 20.

ICES, Toronto, Ontario, Canada; School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada; Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada.

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July 2020

Understanding the Joint Impacts of Fine Particulate Matter Concentration and Composition on the Incidence and Mortality of Cardiovascular Disease: A Component-Adjusted Approach.

Environ Sci Technol 2020 04 11;54(7):4388-4399. Epub 2020 Mar 11.

Environmental Health Science and Research Bureau, Health Canada, 101 Tunney's Pasture, Ottawa, Ontario K1A 0K9, Canada.

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April 2020

Infections and the development of childhood acute lymphoblastic leukemia: a population-based study.

Eur J Cancer Prev 2020 11;29(6):538-545

Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto.

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November 2020

Narrowing the policy gap: lessons from years 2 and 3 of the British Columbia influenza prevention policy.

Hum Vaccin Immunother 2020 Jun 10;16(6):1354-1363. Epub 2020 Jan 10.

School of Population and Public Health, University of British Columbia , Vancouver, B.C., Canada.

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June 2020

The impact of air pollution on the incidence of diabetes and survival among prevalent diabetes cases.

Environ Int 2020 01 24;134:105333. Epub 2019 Nov 24.

Department of Environmental and Occupational Health, Public Health Ontario, 480 University Ave. Suite 300, Toronto, ON M5G 1V2, Canada; Population Studies Division, Environmental Health Science and Research Bureau, Health Canada, Finance Bldg, 101 Tunney's Pasture Drwy, Ottawa, ON K1A 0K9, Canada; ICES, 2075 Bayview Ave. G1 06, Toronto, ON M4N 3M5, Canada; Dalla Lana School of Public Health, University of Toronto, 155 College St. Room 500, Toronto, ON M5T 3M7, Canada. Electronic address:

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January 2020

Exploring indirect protection associated with influenza immunization - A systematic review of the literature.

Vaccine 2019 11 22;37(49):7213-7232. Epub 2019 Oct 22.

Public Health Ontario, 480 University Avenue, Suite 300, Toronto, Ontario M5G 1V2, Canada; Department of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western University, 1151 Richmond Street, London, Ontario N6A 5C1, Canada. Electronic address:

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November 2019

Pitfalls in measuring temporal trends for late diagnosis of viral hepatitis.

J Hepatol 2019 12 22;71(6):1251-1254. Epub 2019 Oct 22.

Department of Medicine, University of Toronto, Toronto, Canada; University Health Network, Toronto, Canada; Toronto Centre for Liver Disease and Toronto General Research Institute, Toronto, Canada.

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December 2019

A nested case-control study measuring pertussis vaccine effectiveness and duration of protection in Manitoba, Canada, 1992-2015: A Canadian Immunization Research Network Study.

Vaccine 2019 11 26;37(48):7132-7137. Epub 2019 Sep 26.

Vaccine and Drug Evaluation Centre, Department of Community Health Sciences, University of Manitoba, Winnipeg, MB, Canada. Electronic address:

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November 2019

Exposure to ambient air pollution and the incidence of congestive heart failure and acute myocardial infarction: A population-based study of 5.1 million Canadian adults living in Ontario.

Environ Int 2019 11 3;132:105004. Epub 2019 Aug 3.

ICES, Toronto, ON, Canada; Public Health Ontario, Toronto, ON, Canada; Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.

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November 2019

Characteristics of patients vaccinated against influenza in physician offices versus pharmacies and predictors of vaccination location: a cross-sectional study.

CMAJ Open 2019 Apr-Jun;7(2):E421-E429. Epub 2019 Jun 21.

School of Pharmacy (Waite, Houle), University of Waterloo, Kitchener, Ont.; Leslie Dan Faculty of Pharmacy (Cadarette, Consiglio), University of Toronto; ICES (Cadarette, Campitelli, Consiglio, Kwong); Department of Family and Community Medicine (Kwong), University of Toronto, Toronto, Ont.

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June 2019

Acellular pertussis vaccine effectiveness and waning immunity in Alberta, Canada: 2010-2015, a Canadian Immunization Research Network (CIRN) study.

Vaccine 2019 07 1;37(30):4140-4146. Epub 2019 Jun 1.

Dalla Lana School of Public Health, University of Toronto, 155 College St., 6th Floor, Toronto, Ontario M5T 3M7, Canada; Public Health Ontario, 480 University Ave., Suite 300, Toronto, Ontario M5G 1V2, Canada; ICES, 2075 Bayview Ave, Room G1-06, Toronto, Ontario M4N 3M5, Canada; Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, 6th Floor, Toronto, Ontario M5S 1A8, Canada.

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July 2019

Pertussis vaccine effectiveness in a frequency matched population-based case-control Canadian Immunization Research Network study in Ontario, Canada 2009-2015.

Vaccine 2019 05 6;37(19):2617-2623. Epub 2019 Apr 6.

Public Health Ontario, Toronto, ON, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada; ICES, Toronto, ON, Canada; Department of Family & Community Medicine, University of Toronto, Toronto, ON, Canada.

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May 2019

High-dose influenza vaccination.

CMAJ 2019 03;191(11):E313

Faculty of Medicine (Dalcin), Dalhousie University, Halifax, NS; ICES (Kwong); Public Health Ontario (Kwong); Department of Family and Community Medicine (Kwong), University of Toronto, Toronto, Ont.

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March 2019

Reply to Skowronski, De Serres, and Orenstein.

Clin Infect Dis 2019 08;69(6):1085-1086

Center for Health Research, Kaiser Permanente Northwest, Portland, Oregon.

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August 2019

Use of physician billing claims to identify infections in children.

PLoS One 2018 12;13(11):e0207468. Epub 2018 Nov 12.

Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.

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April 2019

Acute Myocardial Infarction after Laboratory-Confirmed Influenza Infection.

N Engl J Med 2018 06;378(26):2540-2541

Institute for Clinical Evaluative Sciences, Toronto, ON, Canada

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June 2018

Long-term exposure to air pollution and the incidence of multiple sclerosis: A population-based cohort study.

Environ Res 2018 10 22;166:437-443. Epub 2018 Jun 22.

Institute for Clinical Evaluative Sciences, Toronto, ON, Canada; Public Health Ontario, Toronto, ON, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada. Electronic address:

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October 2018

Quadrivalent human papillomavirus vaccination in girls and the risk of autoimmune disorders: the Ontario Grade 8 HPV Vaccine Cohort Study.

CMAJ 2018 05;190(21):E648-E655

Department of Public Health Sciences (Liu, Lévesque), Queen's University, Kingston, Ont.; Department of Epidemiology, Biostatistics and Occupational Health (Smith), McGill University, Montréal, Que. Division of Allergy and Immunology, Department of Medicine (Ellis), Queen's University, Kingston, Ont.; Allergy Research Unit (Ellis), Kingston General Hospital, Kingston, Ont.; School of Mathematics and Statistics (Whitaker, Farrington), The Open University, Milton Keynes, UK; Vaccine Safety Section, Centre for Immunization and Respiratory Infectious Diseases (Law [retired from the Public Health Agency of Canada June 2015]), Public Health Agency of Canada, Ottawa, Ont.; Institute for Clinical Evaluative Sciences (Kwong, Lévesque), Toronto, Ont.; Public Health Ontario (Kwong), Toronto, Ont.; Department of Family and Community Medicine (Kwong), University of Toronto, Toronto, Ont.; Leslie Dan Faculty of Pharmacy (Lévesque), University of Toronto, Toronto, Ont.

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May 2018

Predictors of Critical Care and Mortality in Bronchiolitis after Emergency Department Discharge.

J Pediatr 2018 08 7;199:217-222.e1. Epub 2018 May 7.

Division of Emergency Medicine, The Hospital for Sick Children, Faculty of Medicine, University of Toronto, Toronto, ON, Canada; Child Health Evaluative Sciences, Research Institute, The Hospital for Sick Children, Faculty of Medicine, University of Toronto, Toronto, ON, Canada; The Institute for Clinical Evaluative Sciences, Toronto, ON, Canada; Division of Clinical Pharmacology and Toxicology, The Hospital for Sick Children, Faculty of Medicine, University of Toronto, Toronto, ON, Canada. Electronic address:

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August 2018

Examination of the British Columbia influenza prevention policy for healthcare workers: Phase 1 qualitative case study.

Hum Vaccin Immunother 2018 10;14(8):1883-1889. Epub 2018 May 10.

e Institute for Clinical Evaluative Sciences , Toronto , ON , Canada.

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April 2019

Temporal trends in multiple sclerosis prevalence and incidence in a large population.

Neurology 2018 04 16;90(16):e1435-e1441. Epub 2018 Mar 16.

From the Division of Neurology, Department of Medicine (D.L.R., K.M.K.), Dalla Lana School of Public Health (H.C., R.C.), and Department of Family and Community Medicine (J.C.K., K.T.), University of Toronto; St. Michael's Hospital (D.L.R., P.G.), Toronto; Institute for Clinical Evaluative Sciences (D.L.R., H.C., A.S.W., J.C.K., A.K.), Toronto; Public Health Ontario (H.C., R.C.), Toronto; Departments of Internal Medicine and Community Health Sciences (R.A.M.), Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba; and Toronto Western Family Health Team (K.T.), University Health Network, Toronto, Canada.

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April 2018

Acute Myocardial Infarction after Laboratory-Confirmed Influenza Infection.

N Engl J Med 2018 Jan;378(4):345-353

From the Institute for Clinical Evaluative Sciences (J.C.K., K.L.S., M.A.C., H.C., D.T.K., L.C.R.), Public Health Ontario (J.C.K., K.L.S., N.S.C., L.C.R., J.B.G.), Dalla Lana School of Public Health (J.C.K., K.L.S., N.S.C., A.J.M., L.C.R.), and the Departments of Family and Community Medicine (J.C.K.) and Laboratory Medicine and Pathobiology (N.S.C., K.K., A.J.M., A.S., J.B.G.), University of Toronto, University Health Network (J.C.K.), North York General Hospital (K.K.), Sunnybrook Health Sciences Centre (D.T.K., A.S.), Sinai Health System (A.J.M.), and the Hospital for Sick Children (J.B.G.), Toronto, Children's Hospital of Eastern Ontario (T.K., D.M.) and the Department of Pathology and Laboratory Medicine, University of Ottawa (T.K.), Ottawa, William Osler Health System, Brampton, ON (D.C.R.), McMaster University, Hamilton, ON (M.S.), London Health Sciences Centre, London, ON (G.Z.), and the Newfoundland and Labrador Public Health Laboratory, St. John's (G.Z.) - all in Canada.

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January 2018

Implementing a province-wide mandatory vaccinate-or-mask policy at healthcare facilities in British Columbia, Canada.

Vaccine 2018 01 6;36(3):395-399. Epub 2017 Dec 6.

School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada; Office of the Provincial Health Officer, Ministry of Health, Victoria, British Columbia, Canada. Electronic address:

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January 2018

A systematic review and meta-analysis of the association between childhood infections and the risk of childhood acute lymphoblastic leukaemia.

Br J Cancer 2018 01 24;118(1):127-137. Epub 2017 Oct 24.

Dalla Lana School of Public Health, University of Toronto, Health Sciences Building, 155 College Street, Toronto, ON, Canada.

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January 2018

The risk of mycobacterial infections associated with inhaled corticosteroid use.

Eur Respir J 2017 09 20;50(3). Epub 2017 Sep 20.

Division of Respirology, Dept of Medicine, University of Toronto, Toronto, ON, Canada.

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September 2017

The impact of repeated vaccination on influenza vaccine effectiveness: a systematic review and meta-analysis.

BMC Med 2017 08 21;15(1):159. Epub 2017 Aug 21.

Public Health Ontario, 480 University Avenue Suite 300, Toronto, Ontario, M5G 1V2, Canada.

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August 2017

Immunization information systems in Canada: Attributes, functionality, strengths and challenges. A Canadian Immunization Research Network study.

Can J Public Health 2017 03 1;107(6):e575-e582. Epub 2017 Mar 1.

Public Health Ontario, Toronto, ON; Dalla Lana School of Public Health, University of Toronto, Toronto, ON; Institute for Clinical Evaluative Services, Toronto, ON.

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March 2017

Trends in influenza vaccine coverage and vaccine hesitancy in Canada, 2006/07 to 2013/14: results from cross-sectional survey data.

CMAJ Open 2016 Jul-Sep;4(3):E455-E462. Epub 2016 Aug 19.

Dalla Lana School of Public Health (Buchan, Kwong), University of Toronto; Institute for Clinical Evaluative Sciences (Kwong); Department of Family and Community Medicine (Kwong), University of Toronto, Toronto, Ont.

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August 2016

Effectiveness of pertussis vaccination and duration of immunity.

CMAJ 2016 Nov 26;188(16):E399-E406. Epub 2016 Sep 26.

Institute for Clinical Evaluative Sciences (Schwartz, Kwong, Campitelli, Stukel, Daneman); Institute of Health Policy, Management, and Evaluation (Schwartz, Stukel, Rosella, Daneman), University of Toronto; The Hospital for Sick Children (Schwartz); Public Health Ontario (Kwong, Deeks, Rosella, Rilkoff, Crowcroft); Dalla Lana School of Public Health (Kwong, Deeks, Bolotin, Crowcroft), University of Toronto; Department of Family and Community Medicine (Kwong), University of Toronto; University Health Network (Kwong); Department of Laboratory Medicine and Pathobiology (Jamieson, Marchand-Austin, Crowcroft), University of Toronto; Public Health Ontario Laboratory Services (Jamieson, Marchand-Austin); Toronto, Ont.; ProvLab Alberta, University of Alberta Hospital (Drews); Department of Pathology and Laboratory Medicine (Drews), University of Alberta, Edmonton, Alta.

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November 2016

Influenza immunization among Canadian health care personnel: a cross-sectional study.

CMAJ Open 2016 Jul-Sep;4(3):E479-E488. Epub 2016 Sep 7.

Dalla Lana School of Public Health (Buchan, Kwong), University of Toronto; Department of Family and Community Medicine (Kwong), University of Toronto; Institute for Clinical Evaluative Sciences (Kwong), Toronto, Ont.

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September 2016

Using physician billing claims from the Ontario Health Insurance Plan to determine individual influenza vaccination status: an updated validation study.

CMAJ Open 2016 Jul-Sep;4(3):E463-E470. Epub 2016 Aug 22.

Institute for Clinical Evaluative Sciences (Schwartz, Jembere, Campitelli, Chung, Kwong); Institute of Health, Policy, Management, and Evaluation (Schwartz), University of Toronto; Dalla Lana School of Public Health (Buchan, Kwong), University of Toronto; Public Health Ontario (Kwong), Toronto Ont.

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August 2016

Impact of pharmacist administration of influenza vaccines on uptake in Canada.

CMAJ 2017 Jan 8;189(4):E146-E152. Epub 2016 Aug 8.

Epidemiology Division (Buchan, Rosella, Kwong), Dalla Lana School of Public Health, University of Toronto; Toronto Public Health (Finkelstein); Institute for Clinical Evaluative Sciences (Juurlink, Kwong), Toronto, Ont.; College of Pharmacy and Faculty of Medicine (Isenor), Dalhousie University, Halifax, NS; Faculty of Pharmaceutical Sciences (Marra) and Faculty of Medicine (Patel), University of British Columbia, Vancouver, BC; Cumming School of Medicine (Russell), University of Calgary, Calgary, Alta.; Public Health Ontario (Rosella, Quach, Kwong), Toronto, Ont.; School of Pharmacy (Waite), University of Waterloo, Waterloo, Ont.

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January 2017

The Economic Burden of Hospital-Acquired Clostridium difficile Infection: A Population-Based Matched Cohort Study.

Infect Control Hosp Epidemiol 2016 09 20;37(9):1068-78. Epub 2016 Jun 20.

2Toronto Health Economics and Technology Assessment Collaborative,Toronto,Canada.

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September 2016

Contribution of influenza viruses to medically attended acute respiratory illnesses in children in high-income countries: a meta-analysis.

Influenza Other Respir Viruses 2016 11 18;10(6):444-454. Epub 2016 Aug 18.

Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.

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November 2016