Chaisson, R E Immune serum markers and CD4 cell counts in HIV-infected intravenous drug users. [electronic resource] - Journal of acquired immune deficiency syndromes 1992 - 456-60 p. digital Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. ISSN: 0894-9255 Subjects--Topical Terms: Biomarkers--bloodBiopterins--analogs & derivativesCD4-Positive T-Lymphocytes--immunologyCohort StudiesFemaleHIV Infections--complicationsHumansImmunoglobulin A--bloodLeukocyte CountLongitudinal StudiesMaleNeopterinProspective StudiesSubstance Abuse, Intravenous--complicationsbeta 2-Microglobulin--analysis