00750nam a22002537i 450000500170000000800410001702200220005802200230008004100080010310000140011124501150012565000160024065000220025665000300027865000320030865000170034065100160035765000090037365000220038265300150040465500150041970000110043477300510044520141212093415.0931001s1993    sp     gr     000 0 spa c  a0965-2140 (papel)  a1360-0443 (online)  aeng1 aKEENE, J.10aEVALUATION OF SYRINGE-EXCHANGE FOR HIV PREVENTION AMONG INJECTING DRUG USERS IN RURAL AND URBAN AREAS OF WALES14aAlto riesgo14aDrogodependencias14aEvaluación de servicios14aIntercambio de jeringuillas14aPrevención14aReino Unido14aSida14aVía intravenosa10aAdicciones 4aDocumental1 aET AL.0 tADDICTIONgVol. 88, no. 8 (1993), p. 1063-1070