Data Safety and Monitoring Boards

From the Departments of Medicine and Critical Care (A.S.S.) and the Center for Global Health Research and Inner City Health Research Unit (J.V.L.), St. Michael's Hospital; and the Departments of Medicine, Surgery, and Biomedical Engineering (A.S.S.) and the Department of Public Health Sciences and the Joint Centre for Bioethics (J.V.L.), University of Toronto - both in Toronto. Address reprint requests to Dr. Slutsky at St. Michael's Hospital, Queen Wing, Rm. 4-042, 30 Bond St., Toronto, ON M5B 1W8, Canada, or at [email protected].