Corresponding author. Department of Obstetrics and Gynecology, Gansu Provincial Hospital, Lanzhou, 730000, China.; Department of Obstetrics and Gynecology, Gansu Provincial Hospital, Lanzhou, 730000, China; The First Clinical Medical College of Gansu University of Chinese Medicine, Lanzhou, 730000, Gansu, China; The First Clinical Medical School, Lanzhou University, Lanzhou, 730000, Gansu, China; NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumour, Lanzhou, 730000, Gansu, China
Linzhen Wei
Department of Obstetrics and Gynecology, Gansu Provincial Hospital, Lanzhou, 730000, China
Yamei Dang
Department of Pathology, Gansu Provincial Hospital, Lanzhou, Gansu, 73000, China
Juan Chu
Department of Obstetrics and Gynecology, Xihe County People's Hospital, Longnan, 742500, China
