title: More research guidelines for comment.
mesh_terms: D006801:Humans; D003906:Developing Countries; D033041:Embryo Research; D026724:Ethical Review; D028744:Ethics Committees, Research / Q000458:organization & administration; D033042:Fetal Research; D017408:Guidelines as Topic; D006805:Human Experimentation; D007258:Informed Consent; D038622:Internationality; D010919:Placebos; D006113:United Kingdom; D035862:Vulnerable Populations
chemical_list: D010919:Placebos