Narcotic analgesic utilization amongst injured workers: using concept mapping to understand current issues from the perspectives of physicians and pharmacists - Parsons, J A; Mamdani, M; Bhattacharyya, O; Fortin, C M; Melo, M; Salmon, C; Raptis, S R; Bain, D; O’Campo, P (BMC Health Serv Res, 2011)