Allan Donner has attained international recognition as a driving force in the develoment of biostatistical methodology in the design and analysis of cluster randomization trials, where he is co-author of the leading text, and in statistical methods for the analysis of interobserver agreement studies. In addition to his independent research, Dr. Donner has collaborated extensively in Canada and with internationally respected health research organizations, including the World Health Organization, the International Vaccine Institute and the Centers for Disease Control. He is a Fellow of both the American Statistical Association and the American College of Epidemiology.