Int J Surg 2019 Jul 8;67:1-7. Epub 2019 May 8.
Division of Nephrology, Department of Medicine, National University Hospital, Singapore; Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore. Electronic address:
Allergy Asthma Proc 2014 Jan-Feb;35(1):e1-8
Department of Pediatrics, University Children's Medical Institute, National University Health System, Singapore.