Lessons from African STD trials noted by US researchers.
D000349:Africa; D000569:Americas; D019049:Developed Countries; D003906:Developing Countries; D004194:Disease; D004812:Epidemiologic Methods; D015658:HIV Infections; D007239:Infections; D009656:North America; D012106:Research; D012749:Sexually Transmitted Diseases; D014481:United States; D014777:Virus Diseases