1. Department of Obstetrics and Gynaecology, Pamela Youde Nethersole Eastern Hospital, Hong Kong
2. Department of Obstetrics and Gynaecology, Prince of Margaret Hospital, Hong Kong
3. Department of Obstetrics and Gynaecology, Kwong Wah Hospital, Hong Kong
4. Department of Obstetrics and Gynaecology, Prince of Wales Hospital, Hong Kong