1. 1Department of Laboratory Medicine, Shengjing Hospital of China Medical University, Shenyang, China;
2. 2Chairman Office, Chinese Association of Maternal and Child Health Studies, Beijing, China;
3. 3Department of Epidemiology and Health Statistics, China Medical University, Shenyang, China;
4. 4Department of Clinical Laboratory Medicine, Capital Medical University Affiliated Beijing Shijitan Hospital, Beijing, China;
5. 5Department of Clinical Laboratory Medicine, Peking University Ninth School of Clinical Medicine, Beijing, China;
6. 6Beijing Key Laboratory of Urinary Cellular Molecular Diagnostics, Beijing, China