Index: LILACS (Americas) Main subject: Placebos / Drugs, Investigational / Clinical Trials, Phase IV as Topic / Clinical Trials, Phase III as Topic / Clinical Trials, Phase II as Topic / Clinical Trials, Phase I as Topic / Periodical / Ethics, Medical / Ethics, Professional Type of study: Controlled clinical trial Language: English Journal: Braz. j. infect. dis Journal subject: Communicable Diseases Year: 1997 Type: Article