1 All India Institute of Medical Sciences, Department of Psychiatry, National Drug Dependence Treatment Centre, New Delhi, 110029, India. Electronic address: rakajain2009@gmail.com.
2 All India Institute of Medical Sciences, Department of Psychiatry, National Drug Dependence Treatment Centre, New Delhi, 110029, India. Electronic address: biswadip.c@gmail.com.
3 All India Institute of Medical Sciences, Department of Psychiatry, National Drug Dependence Treatment Centre, New Delhi, 110029, India. Electronic address: dr.abhisheikhgupta06@gmail.com.