1. Department of Paediatrics, Government Medical College and Hospital, Chandigarh, India
2. Department of Neonatology, Government Medical College and Hospital, Chandigarh, India
3. Department of Radiodiagnosis, Government Medical College and Hospital, Chandigarh, India
4. Department of Radiodiagnosis, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India