This casebook collects 64 case studies each of which raises an important and difficult ethical issue connected with planning, reviewing or conducting health-related research. The book's purpose is to contribute to thoughtful analysis of these issues by researchers and members of research ethics committees (REC's known in some places as ethical review committees or institutional review boards) particularly those involved with studies that are conducted or sponsored internationally. . This collection is envisioned principally as a tool to aid educational programs from short workshops on research