Vijay Viswanathan1, Saigopal Sathyamurthy2. 1. 1 Department of Diabetology, Prof. M. Viswanathan Diabetes Research Centre and MV Hospital for Diabetes , Chennai, Tamil Nadu, India . 2. 2 Department of Epidemiology, Prof. M. Viswanathan Diabetes Research Centre and MV Hospital for Diabetes , Chennai, Tamil Nadu, India .