Zaldívar Basurto, F.; García Montes, J. M.; Flores Cubos, P.; Sánchez Santed, F.; López Ríos, F.; Molina Moreno, A. Validity of the Self-Report on Drug Use by University Students: Correspondence Between Self-Reported Use and Use Detected in Urine. PST 2009, 21, 213-219.