1. Department of Obstetrics and Gynecology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou, Jiangsu, China (mainland)
2. Department of Infectious Diseases, Children’s Hospital of Soochow University, Suzhou, Jiangsu, China (mainland)
3. Department of Ultrasound, Sichuan Provincial Maternity and Child Health Care Hospital, Chengdu, Sichuan, China (mainland)
4. Department of Endocrinology and Metabolism, Xinghua People’s Hospital Affiliated to Kangda College of Nanjing Medical University, Xinghua, Jiangsu, China (mainland)
5. Department of Medical Imaging, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou, Jiangsu, China (mainland)