1. School of Nursing, Li Ka Shing Faculty of Medicine University of Hong Kong Pokfulam Hong Kong
2. School of Nursing, Faculty of Health and Social Development The University of British Columbia Vancouver British Columbia Canada
3. School of Nursing and Health Studies Hong Kong Metropolitan University Kowloon Hong Kong
4. Department of Obstetrics and Gynaecology Queen Elizabeth Hospital Kowloon Hong Kong
5. Department of Obstetrics and Gynaecology, Li Ka Shing Faculty of Medicine University of Hong Kong Pokfulam Hong Kong
6. Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine University of Hong Kong Pokfulam Hong Kong