1. Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC
2. Department of Nutrition and Food Hygiene, School of Radiation Medicine and Public Health, Soochow University, Suzhou, Jiangsu Province, P.R. China
3. Department of Epidemiology, Gillings School of Global Public Health and School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC
4. Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL