Prospective associations between meth/amphetamine (speed) and MDMA (ecstasy) use and depressive symptoms in secondary school students
Frédéric N Brière, Jean-Sébastien Fallu, Michel Janosz, Linda S Pagani
J Epidemiol Community Health Nov 2012, 66 (11) 990-994; DOI: 10.1136/jech-2011-200706