1. Department of Obstetrics and Gynecology University of Hong Kong Queen Mary Hospital Hong Kong China
2. Department of Medical Oncology Charing Cross Trophoblastic Disease Center Charing Cross Campus of Imperial College London London UK
3. Department of Obstetrics and Gynecology Division of Gynecologic Oncology Brigham and Women's Hospital Dana‐Farber Cancer Institute Harvard Medical School Boston Massachusetts USA
4. Department of Obstetrics and Gynecology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China
5. Department of Obstetrics and Gynecology French Trophoblastic Disease Reference Centre Lyon University Hospital Claude Bernard Lyon 1 University Lyon France
6. Department of Obstetrics and Gynecology Institute of Maternal and Child Health Medical College Calicut India
7. John I. Brewer Trophoblastic Disease Center Northwestern University Feinberg School of Medicine Chicago Illinois USA
8. Department of Obstetrics and Gynecology Division of Gynecologic Oncology Radboud University Medical Centre Nijmegen Nijmegen The Netherlands