1. Department of Obstetrics and Gynecology Tuen Mun Hospital Hong Kong SAR
2. Clinical Genetic Service Department of Health Hong Kong SAR
3. Department of Obstetrics and Gynecology Queen Mary Hospital Hong Kong SAR
4. Department of Obstetrics & Gynecology Pamela Youde Nethersole Eastern Hospital Hong Kong SAR
5. Department of Obstetrics and Gynecology Prince of Wales Hospital Hong Kong SAR
6. Department of Obstetrics and Gynecology Queen Elizabeth Hospital Hong Kong SAR
7. Department of Obstetrics and Gynecology United Christian Hospital Hong Kong SAR
8. Clinical Genetics Service Hong Kong Sanatorium & Hospital Hong Kong SAR