| methadone treatment and risk of hiv infection in drug users without legal access to clean injection equipment. | the particular situation of the swiss canton of vaud (population 550,000) provides favourable observational conditions to assess the efficacy of a methadone treatment scheme in reducing the risk of human immunodeficiency virus (hiv) infection among drug users. on the one hand, the canton has a long tradition of methadone treatment dispensed by medical practitioners. on the other hand, no legal access to clean injection equipment was provided up to 1989. for the 754 drug addicts having entered at ... | 1995 | 7610718 |