1. AGO and Kliniken Essen Mitte, Essen, Germany;
2. BGOG and University of Leuven, Leuven Cancer Institute, Leuven, Belgium;
3. GINECO and Institut Claudius Regaud, Toulouse, France;
4. AGO and Coordinating Center for Clinical Trials, Marburg, Germany;
5. AGO and Frauenklinik, Evangelisches Krankenhaus Duesseldorf, Duesseldorf, Germany;
6. MITO and Istituto Nazionale Dei Tumori, Naples, Italy;
7. NSGO and Odense University Hospital, Odense, Denmark;
8. GINECO and Hôpital Tenon, Paris, France;
9. GINECO and Institut Bergonié, Bordeaux, France;
10. GINECO and Centre Jean Perrin, Clermont-Ferrand, France;
11. GINECO and European Georges Pompidou Hospital, Paris, France;
12. SGOG and Shanghai Fudan University, Shanghai, China;
13. NSGO and Linköping University and Karolinska Institute, Linköping, Sweden;
14. KGOG and Seoul National University, Seoul, Korea South;
15. GEICO and Bellvitge Hospital, Barcelona, Spain;
16. MITO and Fondazione IRCCS Istituto Nazionale Dei Tumori, Milan, Italy;
17. NCRI and Imperial College London, London, United Kingdom;
18. AGO-Austria and University of Vienna, Vienna, Austria;
19. AGO and Charité Campus Virchow-Klinikum, Berlin, Germany;