Heins, MD, A., M. Grammas, BS, J. K. Heins, RN, MSN, CRNP, M. W. Costello, MD, K. Huang, MS, and S. Mishra, PhD. “Determinants of Variation in Analgesic and Opioid Prescribing Practice in an Emergency Department”. Journal of Opioid Management, vol. 2, no. 6, Nov. 2006, pp. 335-40, doi:10.5055/jom.2006.0049.