1. Department of Pathology, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, China
2. Department of Obstetrics and Gynecology, King Chulalongkorn Memorial Hospital, Chulalongkorn University, Bangkok, Thailand
3. Department of Internal Medicine, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang, China
4. Department of Gynaecology and Obstetrics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China