1. Department of Obstetrics and Gynecology, Changzhou Hospital of Traditional Chinese Medicine, Nanjing University of Chinese Medicine, Changzhou, China;
2. Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China;
3. Department of Laboratory Medicine, Changzhou Hospital of Traditional Chinese Medicine, Changzhou, China