Velázquez Rivera, MD, I., L. Velázquez Clavarana, BSc, P. García Velasco, BSc, and C. Melero Ramos, BSc. “Opioid-Induced Constipation in Chronic Pain: Experience With 180 Patients”. Journal of Opioid Management, vol. 15, no. 1, Jan. 2019, pp. 69-76, doi:10.5055/jom.2019.0487.