Affiliation: | 1. Department of Obstetrics and Gynaecology, Tsan Yuk Hospital and Queen Mary Hospital, The University of Hong Kong, Hong Kong, People's Republic of China;2. Department of Surgery, Queen Mary Hospital, The University of Hong Kong, Hong Kong, People's Republic of China;3. Department of Pathology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, People's Republic of China;4. Department of Diagnostic Radiology, Queen Mary Hospital, The University of Hong Kong, Hong Kong, People's Republic of China |