Tuberculin skin testing in intravenous drug users: Differences between HIV-seropositive and HIV-seronegative subjects

1. Portu, J.J.
2. Aldamiz-Etxebarria, M.
3. Agud, J.M.
4. Arévalo, J.M.
5. Almaraz, M.J.
6. Ayensa, C.