Madadi, Parvaz, Ursula Amstutz, Michael Rieder, Shinya Ito, Vincent Fung, Soomi Hwang, Jacques Turgeon, Veronique Michaud, Gideon Koren, and Bruce C Carleton. 2018. “CLINICAL PRACTICE GUIDELINE: CYP2D6 GENOTYPING FOR SAFE AND EFFICACIOUS CODEINE THERAPY”. Journal of Population Therapeutics and Clinical Pharmacology 20 (3). https://www.jptcp.com/index.php/jptcp/article/view/368.