1. Department of Psychiatry, All India Institute of Medical Sciences, Bhopal, India
2. Department of Psychiatry, All India Institute of Medical Sciences, Delhi, India
3. National Drug Dependence Treatment Centre and Department of Psychiatry, All India Institute of Medical Sciences, New Delhi, India
4. Department of Medical Oncology, Institute of Rotary Cancer Hospital (IRCH), All India Institute of Medical Sciences, Delhi, India