Bhatnagar, MD, S., S. Mishra, MD, M. Srikanti, MD, and D. Gupta, MD. “Cancer Pain Management at a Tertiary Care Cancer Center in India—A Retrospective Analysis of 3,238 Patients”. Journal of Opioid Management, vol. 4, no. 6, Jan. 2018, pp. 361-8, doi:10.5055/jom.2008.0040.