A Companion to BioethicsA Companion to Bioethics presents the central issues and concepts in bioethics in an authoritative yet highly accessible manner. Now fully revised and updated to reflect the current state of the field, the 49 essays, each specially written by leading experts, span an unparalleled range of topics, including discussion of the moral status of embryos and fetuses, new genetics, life and death, resource allocation, organ donations, AIDS, human and animal