title: Cannabis use among opioid-dependent individuals on opioid substitution therapy.
authors.affiliation: Department of Psychiatry, National Drug Dependence Treatment Centre, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Yatan Pal Singh
authors.initials: YP
authors.lastname: Balhara
authors.affiliation: Department of Psychiatry, National Drug Dependence Treatment Centre, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Raka
authors.initials: R
authors.lastname: Jain