| improving survey methods in sero-epidemiological studies of injecting drug users: a case example of two cross sectional surveys in serbia and montenegro. | little is known about the prevalence of hiv or hcv in injecting drug users (idus) in serbia and montenegro. we measured prevalence of antibodies to hiv (anti-hiv) and hepatitis c virus (anti-hcv), and risk factors for anti-hcv, in community-recruited idus in belgrade and podgorica, and determined the performance of a parallel rapid hiv testing algorithm. | 2009 | 19203380 |