Assistant Professor of Medicine in the Department ofBioethics at Dalhousie University in Halifax, Canada. His research interests include the ethics of clinical trials, research risk, and protecting communities in research. He has written extensively about the ethics of randomized controlled trials. A major interest of his is the implications of clinical equipoise for the design of these trials. Hehas written a variety of publications that set out a comprehensive and systematic approach to the moral analysis of risk in research, focusing on the role of clinical equipoise and minimal risk. Professor Weijer received his M.D. from the University of Alberta in Edmonton and his Ph.D. in experimental medicine and philosophy from McGill University in Montreal, Canada.