Prevalence and correlates of self-reported substance use among undergraduate students in a medical college of North India: An observational study. - Dagar, Happy; Kumar, Mithilesh; Parashar, Lokesh; Rana, Erika; Tyagi, Mansi; Nimbria, Gaurav; Handa, Kritika; Singla, Khushi; Singh, Mitasha (Journal of Indira Gandhi Institute of Medical Sciences, 2025)