Rao Ravindra, Agrawal Alok, Kishore Kunal, Ambekar Atul
National Drug Dependence Treatment Centre and Department of Psychiatry, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India 110029.
Bull World Health Organ. 2013 Feb 1;91(2):150-3. doi: 10.2471/BLT.12.111815.