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Secades-Villa R, Garcia-Rodríguez O, Jin CJ, Wang S, Blanco C.Secades-Villa R, et al.Int J Drug Policy. 2015 Feb;26(2):135-42. doi: 10.1016/j.drugpo.2014.07.011. Epub 2014 Aug 2.Int J Drug Policy. 2015.PMID: 25168081Free PMC article.