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Aguinacoa, A. & Barrab A. International Journal of Drug Policy Volume 50, December 2017, Pages 9-10
Scoppetta Díaz-Granados, O. & Castaño, G. A. Health and Addictions, Vol. 18, No.1, 81-88
Socías, M.E. & Wood, E. BMJ 2017; 358
Gary R. P. & Caroline C. Drugs: Education, Prevention and Policy, 25:4, 329-336
Correa Muñoz, A.M. & Pérez Gómez, A. liber. vol.19 no.2 Lima jul./dic. 2013