1. Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
2. Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
3. Department of Nutrition and Food Hygiene, School of Public Health, Soochow University, Suzhou, China
4. Department of Public Health, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
5. Department of Public Health, Faculty of Medicine, Minia University, El-Minya, Egypt
6. Medical Informatics Center, Peking University Health Science Center, Beijing, China