Committee Membership: The composition of a committee; the state or status of being a member of a committee.Ethics Committees: Committees established by professional societies, health facilities, or other institutions to consider decisions that have bioethical implications. The role of these committees may include consultation, education, mediation, and/or review of policies and practices. Committees that consider the ethical dimensions of patient care are ETHICS COMMITTEES, CLINICAL; committees established to protect the welfare of research subjects are ETHICS COMMITTEES, RESEARCH.Advisory Committees: Groups set up to advise governmental bodies, societies, or other institutions on policy. (Bioethics Thesaurus)Ethics Committees, Research: Hospital or other institutional committees established to protect the welfare of research subjects. Federal regulations (the "Common Rule" (45 CFR 46)) mandate the use of these committees to monitor federally-funded biomedical and behavioral research involving human subjects.Professional Staff Committees: Committees of professional personnel who have responsibility for determining policies, procedures, and controls related to professional matters in health facilities.Ethics Committees, Clinical: Hospital or other institutional ethics committees established to consider the ethical dimensions of patient care. Distinguish from ETHICS COMMITTEES, RESEARCH, which are established to monitor the welfare of patients or healthy volunteers participating in research studies.Societies, Medical: Societies whose membership is limited to physicians.