K. Ower, MD, FRCPC, P. Morley-Forster, MD, FRCPC, and D. Moulin, MD, FRCPC, “Fluctuating QTc interval in an asymptomatic patient treated with methadone for chronic pain”, J of Opioid Management, vol. 1, no. 2, pp. 73–76, May 2005.