1. Clinical Laboratory, Huzhou Central Hospital, Affiliated Central Hospital of Huzhou University, Huzhou, Zhejiang, China
2. The First Department of General Surgery, Affiliated Hospital of Chengde Medical University, Chengde, Hebei, China
3. The First Department of Gynecology, Affiliated Hospital of Chengde Medical University, Chengde, Hebei, China
4. The Department of General Surgery, The Sixth Hospital of Chengde, Chengde, Hebei, China