1. First Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China (mainland)
2. Department of Immunology and Microbiology, Guiyang College of Traditional Chinese Medicine, Guiyang, Guizhou, China (mainland)
3. Department of Obstetrics and Gynecology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China (mainland)