The National Institute of Health (NIH) of USA defined "bioethics" as: "Bioethics is the study of ________, _________, and ________ issues that arise in biomedicine and biomedical research. Bioethics includes medical ethics, which focuses on issues in health care; research ethics, which focuses issues in the conduct of research; environmental ethics, which focuses on issues pertaining to the relationship between human activities and the environment, and public health ethics, which addresses ethical issues in public health."