1. Department of Community and Family Medicine and Centre of Research and Promotion of Women’s Health, School of Public Health, Chinese University of Hong Kong, Room 419, School of Public Health, Prince of Wales Hospital, Shatin, New Territories, Hong Kong SAR
2. Department of Food Science and Human Nutrition, Iowa State University, 2312 Food Sciences Building, Ames, Iowa 50011-1061
3. Cancer Care Ontario and Dalla Lana School of Public Health, University of Toronto, 620 University Avenue, 11th Floor, Toronto, Ontario M5G 2L7, Canada
4. Department of Mathematics and Statistics, University of Guelph, 50 Stone Road East, Room 514, MacNaughton Building, Guelph, Ontario N1G 2W1, Canada