Williams, PhD, MS, R., N. Bosnic, BA, A. W. Duncan, PhD, MS, M. Brogan, BA, and S. F. Cook, PhD. “Prevalence of Opioid Dispensings and Concurrent Gastrointestinal Medications in an Elderly Population from Ontario, Canada”. Journal of Opioid Management, vol. 4, no. 4, Jan. 2018, pp. 193-00, doi:10.5055/jom.2008.0025.