1. Department of Clinical Sciences, Faculty of Medicine, General Sir John Kotelawala Defence University , Ratmalana 10390 , Sri Lanka
2. Department of Clinical Medicine, Faculty of Medicine, University of Colombo , Colombo 00800 , Sri Lanka
3. Department of Endocrinology, Bharti Hospital , Karnal, Haryana 132001 , India
4. University Centre for Research and Development, Chandigarh University , Mohali 140413 , India
5. Department of Metabolism, Digestion and Reproduction, Imperial College , W12 0NN, London , UK
6. Diabetes and Hormone Centre , Colombo 00200 , Sri Lanka