Affiliation: | 1. Department of Obstetrics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China Department of Obstetrics and Gynecology, Nantong University, Nantong, Jiangsu, China;2. Department of Obstetrics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China;3. Department of Clinical Biobank, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China;4. Department of Obstetrics and Gynecology, Nantong University, Nantong, Jiangsu, China;5. Department of Pediatric Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China |