Mason, MD JW, Schwertschlag, MD, PhD US, Klutzaritz, BS V, Canafax, PharmD DM. Electrocardiographic and cardiovascular diagnostic characteristics of patients receiving long-term opioid therapy for pain. J of Opioid Management [Internet]. 2014 Mar. 1 [cited 2024 Apr. 29];10(2):103-9. Available from: https://wmpllc.org/ojs/index.php/jom/article/view/581