McCaffrey, PhD, S.; Manser, BA, K. A.; Trudeau, PhD, K. J.; Niebler, DO, G.; Brown, MD, C.; Zarycranski, MS, D.; Budman, PhD, S. H. The Natural History of Prescription Opioid Abuse: A Pilot Study Exploring Change in Routes of Administration and Motivation for Changes. J of Opioid Management 2018, 14, 397-405.