00632nam a22002297i 450000500170000000800410001702200220005804100080008010000180008824500570010665000120016365000200017565000220019565000090021765000200022665000160024665000270026265300150028965500150030470000190031977300640033820141212093636.0960314s1996    sp     gr     000 0 spa c  a0376-8716 (papel)  aeng1 aANTHONY, J.C.10aEARLY-ONSET DRUG USE AND RISK OF LATER DRUG PROBLEMS14aConsumo14aDrogas ilegales14aDrogodependencias14aEdad14aEpidemiología14aEvolución14aFactor de protección10aAdicciones 4aDocumental1 aPETRONIS, K.R.0 tDRUG AND ALCOHOL DEPENDENCEgVol. 40, no. 1 (1995), p. 9-15