S. Nalamachu, MD, J. Gudin, MD, C. Datto, MD, MS, K. Coyne, PhD, MPH, J.-L. Poon, PhD, and Y. Hu, MD, PhD, “Efficacy and safety of naloxegol for opioid-induced constipation assessed by specific opioid medication, opioid dose, and duration of opioid use”, J of Opioid Management, vol. 14, no. 3, pp. 211–221, Jul. 2018.