1. Use transition between illegal drugs among Brazilian university students Castaldelli-Maia, Joao Mauricio; Martins, Silvia S.; Garcia de Oliveira, Lúcio; van Laar, Margriet; Andrade, Arthur G.; Nicastri, Sérgio 2014 Articles EpidemiologyDrug abuseDrug abuse--EpidemiologyBrazilian studentsCollege students--Drug useInhalant abuseMarijuana