1. Department of Nutrition and Food Hygiene, Institute of Nutrition, School of Public Health, Fudan University, Shanghai 200032, China
2. Department of Public Health Sciences, Penn State College of Medicine, Hershey, PA 17033, USA
3. Department of Family and Community Medicine, Penn State College of Medicine, Hershey, PA 17033, USA
4. Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China