| Affiliation: | 1. Department of Obstetrics and Gynaecology, Princess Margaret Hospital, Hong Kong, Hong Kong;2. Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Room 520N, HAHO Building, 147B Argyle Street, Kowloon, Hong Kong;3. Department of Radiology, Princess Margaret Hospital, Hong Kong, Hong Kong;1. Fetal Centre, Liverpool Women''s Hospital, Liverpool LA 7SS, UK;1. Department of Obstetrics and Gynecology, University of Giessen, Klinikstr. 32, D-35385 Giessen, Germany;2. Department of Radiology, University of Giessen, Klinikstr. 36, D-35385 Giessen, Germany |
