1 Karen M. Jennison Endowed Chair in Gynecologic Oncology, Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Denver, USA. Electronic address: saketh.guntupalli@cuanschutz.edu.
2 Radiotherapy, Erasmus MC Cancer Institute, University Medical Center Rotterdam, P.O. Box 2040, internal postal address NT/558k, 3000, CA, Rotterdam, the Netherlands. Electronic address: r.nout@erasmusmc.nl.
3 Department of Obstetrics and Gynaecology, University of Pretoria, Hatfield 0028, South Africa. Electronic address: gretadreyer@mweb.co.za.