title: Letter: Ethics of human experimentation.
mesh_terms: D000029:Abortion, Legal; D001291:Attitude of Health Personnel; D004992:Ethics, Medical; D005260:Female; D005333:Fetus; D006805:Human Experimentation; D006801:Humans; D008297:Male; D010919:Placebos; D011247:Pregnancy; D011471:Prostatic Neoplasms / Q000188:drug therapy; D014481:United States
chemical_list: D010919:Placebos