Department of Physiology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka; Queensland University of Technology (QUT), Institute of Health and Biomedical Innovation, Brisbane, Australia. Electronic address: ranil@physiol.cmb.ac.lk. Fortis-C-DOC Centre of Excellence for Diabetes, Metabolic Diseases and Endocrinology, Chirag Enclave, New Delhi, India; National Diabetes, Obesity and Cholesterol Foundation (N-DOC), New Delhi, India; Diabetes Foundation (India), New Delhi, India.