Gupta, MS, S., Patel, PharmD, H., Scopel, MD, MBA, J. and Mody, MBA, PhD, R.R. 2015. Impact of constipation on opioid therapy management among long-term opioid users, based on a patient survey. Journal of Opioid Management. 11, 4 (Jul. 2015), 325–338. DOI:https://doi.org/10.5055/jom.2015.0282.