P L Prasad1, C G Wilson2, K Nagendra1, Vipan Chandar3. 1. Reader, Department of Paediatrics, Armed Forces Medical College, Pune - 411 040. 2. Ex-Head, Department of Paediatrics, Armed Forces Medical College, Pune - 411 040. 3. Senior Adviser (Paediatrics), Command Hospital, (Southern Command), Pune-411 040.