title: Two-tiered health care: the root of ethical problems in recent clinical trials.
authors.forename: T F
authors.initials: TF
authors.lastname: Brewer
authors.forename: S J
authors.initials: SJ
authors.lastname: Heymann
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards*; D019049:Developed Countries; D003906:Developing Countries; D004992:Ethics, Medical; D015658:HIV Infections / Q000517:prevention & control; D006297:Health Services Accessibility; D006801:Humans; D038622:Internationality; D010919:Placebos; D037841:Pregnant People; D011787:Quality of Health Care; D040841:Resource Allocation; D036302:Therapeutic Human Experimentation; D014376:Tuberculosis / Q000188:drug therapy; D035862:Vulnerable Populations
chemical_list: D010919:Placebos