TY  - JOUR
A1  - WHO International Collaborating Group for the study of the WHO Staging System
T1  - Proposed 'World Health Organization staging system for HIV infection and disease': preliminary testing by an international collaborative cross-sectional study
Y1  - 1993
JF  - AIDS
VL  - 7
IS  - 5
SP  - 711
EP  - -718

ER  -