Portenoy, MD, R.K., Bruns, PsyD, D., Shoemaker, BSN, B. and Shoemaker, MD, S.A. 2018. Breakthrough pain in community-dwelling patients with cancer pain and noncancer pain, Part 1: Prevalence and characteristics. Journal of Opioid Management. 6, 2 (Jan. 2018), 97–108. DOI:https://doi.org/10.5055/jom.2010.0009.