{{Cite journal| doi = 10.1503/cmaj.131301| issn = 1488-2329 (Electronic) 0820-3946 (Print) 0820-3946 (Linking)| volume = 186| issue = 8| pages = –263-72| last1 = Haller| first1 = D. M.| last2 = Meynard| first2 = A.| last3 = Lefebvre| first3 = D.| last4 = Ukoumunne| first4 = O. C.| last5 = Narring| first5 = F.| last6 = Broers| first6 = B.| title = Effectiveness of training family physicians to deliver a brief intervention to address excessive substance use among young patients: a cluster randomized controlled trial| journal = CMAJ| date = 2014-03-13| pmid = 24616136}}