The third edition has 120 new articles, among them Artificial nutrition and hydration, Bioterrorism, Cloning, Cybernetics, Dementia, Managed care, and Nanotechnology. Some 200 articles have been extensively revised, and 100 additional articles have new bibliographies. The alphabetical entries address a wide range of topics that raise difficult and important questions. Abortion, genetic screening, female genital mutilation, the right to die, health issues of immigration, and corporate responsibility are but a few. The contributors discuss the issues from many points of view. The abortion article includes sections covering medical perspectives, contemporary ethical and legal aspects, and Jewish, Catholic, Protestant, and Islamic religious perspectives. There are also articles about bioethics in Buddhism, eugenics, health policy, women as health-care professionals, whistle-blowing in health care, and veterinary ethics. All of the articles are signed, and all have bibliographies. Ample cross-references help readers find related useful material. A list of all the articles and a topical outline appear in volume 1. A series of appendixes offers codes, oaths, and directives related to bioethics; additional resources; key legal cases; and an annotated bibliography of literary works that have a medical component. A detailed index helps users find material that may be scattered over numerous entries, such as information about surrogate motherhood.