S. Nalamachu, MD, D. Ruck, ARNP, R. Nalamasu, S. Fasbinder, and R. Bansal, “Open-label study to evaluate the efficacy and safety of extended-release hydromorphone in patients with chronic neuropathic pain”, J of Opioid Management, vol. 9, no. 1, pp. 43–49, Jan. 2013.