Cannabis Use Disorder and Perioperative Outcomes in Major Elective Surgeries A Retrospective Cohort Analysis Akash Goel, M.D., M.P.H., Brandon McGuinness, M.D.; Naheed K. Jivraj, M.B.B.S., M.Sc.; Duminda N. Wijeysundera, M.D., Ph.D.; Murray A. Mittleman, M.D., Dr.P.H.; Brian T. Bateman, M.D., M.Sc., Hance Clarke, M.D., Ph.D.; Lakshmi P. Kotra, B.Pharm. (Hons), Ph.D.; Karim S. Ladha, M.D., M.Sc. Anesthesiology, 2020, 132, (4), 625-635.     Abstract and Introduction Background: Although cannabis is known to have cardiovascular and psychoactive effects, the implications of its use before surgery are currently unknown. The objective of the present study was to determine whether patients with an active cannabis use disorder have an elevated [...]