1. Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu, China,
2. Sichuan Provincial Maternal and Child Health Hospital, Chengdu, China,
3. West China Second University Hospital, Sichuan University, Chengdu, China,
4. Chengdu Women’s & Children’s Central Hospital, Chengdu, China, and
5. Department of Clinical Nutrition, First Affiliated Hospital of Kunming Medical University, Kunming, China