Steven D Stovitz1, Hailey R Banack2, Jay S Kaufman3. 1. Department of Family Medicine and Community Health, University of Minnesota, Minneapolis, Minnesota, USA. stovitz@umn.edu. 2. Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, The State University of New York, New York, New York, USA. 3. Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada.