R. A. Black, PhD, K. J. Trudeau, PhD, T. A. Cassidy, MPH, S. H. Budman, PhD, and S. F. Butler, PhD, “Associations between public health indicators and injecting prescription opioids by prescription opioid abusers in substance abuse treatment”, J of Opioid Management, vol. 9, no. 1, pp. 5–17, Jan. 2013.