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Annals of the New York Academy of Sciences > 1419 > 1 > 74 - 89
Health policy > 2012 > 106 > 2 > 114-119
Journal of the American Medical Directors Association > 2011 > 12 > 7 > 487-492.e1
Journal of Substance Abuse Treatment > 2005 > 29 > 3 > 167-172