1. Department of Operating Room of Anesthesiology, Zaozhuang Traditional Chinese Medicine Hospital, Beijing University of Chinese Medicine Zaozhuang Hospital, Beijing University of Chinese Medicine Fourth Clinical Medicine College, Zaozhuang 277000, Shandong, China
2. The Second Department of Internal Medicine-Neurology, Zhangqiu District People’s Hospital, No. 1920 Mingshui Huiquan Road, Zhangqiu, Jinan 250200, Shandong, China
3. Department of Obstetrics, Taian Maternal and Child Health Hospital, Taian 271000, Shandong, China
4. Department of Outpatient, Taian Maternal and Child Health Hospital, Taian 271000, Shandong, China
5. Department of Obstetrics, Zhangqiu District People’s Hospital, Jinan 250200, Shandong, China