1 Department of Obstetrics, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, HuaXiu Road 19th, Haikou, 570311, Hainan, China.
2 Department of Hepatobiliary Surgery, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, China.
3 Department of Obstetrics, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, HuaXiu Road 19th, Haikou, 570311, Hainan, China. Shileihnyy@163.com.
4 Department of Pathology, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, China.