Institution: | 1. Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2G1;2. Division of Cancer Epidemiology, Prevention and Screening, Alberta Health Services, Edmonton, Alberta, Canada T5J 3H1;3. Department of Mathematics and Statistics, York University, Toronto, Ontario, Canada M3J 1P3;4. Department of Biostatistics, School of Public Health, University of Michigan, Ann Arbor, MI 48109‐2029, USA |