Pharmaceutical Opioid Use and Dependence among People Living with Chronic Pain : Associations Observed within Pain and Opioids in Treatment (POINT) Cohort
G. Campbell, S. Nielsen B. Larance, R. Bruno, R. Mattick, W. Hall, N. Lintzens, M. Cohen, K. Smith, L. Degenhardt, Pain Medicine 2015; 16 :1745-1758