1. Department of Reproduction, Suqian Maternity Hospital, Suqian, Jiangsu, China (mainland)
2. Department of Treating Potential Diseases, Xuzhou City Hospital of Traditional Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Xuzhou, Jiangsu, China (mainland)
3. Department of Gynecology, Xuzhou City Hospital of Traditional Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Xuzhou, Jiangsu, China (mainland)
4. Department of Gynecology and Obstetrics, Suqian Maternity Hospital, Suqian, Jiangsu, China (mainland)