A study was performed on 51 human immunodeficiency virus (HIV-1)-infected patients with a previous history of drug abuse. By the CDC staging system for HIV infection they were mainly in advanced stages of that infection, 67% were in IV-A and 8% in IV-CI. Patients were divided in two groups, one composed of 33 individuals who needed AZT therapy and the other of those who did not need that medication (18 patients...
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