Heins, MD, Alan, Marianthe Grammas, BS, Janet Kaye Heins, RN, MSN, CRNP, Melissa W. Costello, MD, Kun Huang, MS, and Satya Mishra, PhD. 2006. “Determinants of Variation in Analgesic and Opioid Prescribing Practice in an Emergency Department”. Journal of Opioid Management 2 (6):335-40. https://doi.org/10.5055/jom.2006.0049.