Current CD4 cell count and the short-term risk of AIDS and death before the availability of effective antiretroviral therapy in HIV-infected children and adults - Dunn, David; Woodburn, Patrick; Duong, Trinh; Peto, Julian; Phillips, Andrew; Gibb, Di; Porter, Kholoud; HIV Paediatric Prognostic Markers Collaborative Study (HPPMCS); Concerted Action on Sero-Conversion to AIDS; Death in Europe (CASCADE) Collaboration (The Journal of infectious diseases, 2008)