Affiliation: | aDepartment of Obstetrics and Gynaecology, Centre for Reproductive Medicine, West China Second University Hospital, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Sichuan University, Chengdu, People’s Republic of China;bDepartment of Anesthesia, Sichuan Integrative Medicine Hospital, Sichuan Academy of Chinese Medicine Science, Chengdu, People’s Republic of China |