Were Tuskegee & Willowbrook 'studies in nature'?
D000407:Alabama; D004992:Ethics, Medical; D006505:Hepatitis / Q000628:therapy; D006805:Human Experimentation; D006801:Humans; D008297:Male; D028681:Moral Obligations; D009518:New York; D033281:Nontherapeutic Human Experimentation; D012106:Research / Q000592:standards*; D018570:Risk Assessment; D012924:Social Conditions; D013587:Syphilis / Q000628:therapy; D035862:Vulnerable Populations; D028761:Withholding Treatment