National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine research support non-u.s. gov't adult randomized controlled trials as topic regression analysis follow-up studies hiv infections / complications* uganda / epidemiology Cohort Studies pneumonia aids-related opportunistic infections / complications viral / mortality neil french pneumococcal vaccines* hiv infections / mortality viral / prevention & control* viral / complications aids-related opportunistic infections / prevention & control* aids-related opportunistic infections / mortality pmid:15166540 doi:10.1097/00002030-200405210-00018 christine watera jessica nakiyingi