1. Department of Perinatal Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China.
2. Beijing Key Laboratory of Clinical Epidemiology, School of Public Health, Capital Medical University, Beijing, China.
3. School of Medical and Health Sciences, Edith Cowan University, Perth, Australia.
4. Bioyong Technology Co., Ltd., Beijing, China.
5. School of Public Health, Shandong First Medical University, Taian, China.