title: Ethical aspects in trials of implantable medical devices.
mesh_terms: D002986:Clinical Trials as Topic / Q000941:ethics*; D017147:Defibrillators, Implantable; D006801:Humans; D010138:Pacemaker, Artificial; D010919:Placebos; D019736:Prostheses and Implants; D013514:Surgical Procedures, Operative / Q000941:ethics*
chemical_list: D010919:Placebos
keywords: Biomedical and Behavioral Research