1. ICGON, Hospital Clínic de Barcelona, Universitat de Barcelona, Barcelona, Spain
2. Department of Radiology, Hospital Clínic de Barcelona, Universitat de Barcelona, Barcelona, Spain
3. Department of Radiotherapy, Hospital Clínic de Barcelona, Universitat de Barcelona, Barcelona, Spain
4. Department of Obstetrics and Gynecology, Universidad de Navarra, School of Medicine, University of Navarra, Pamplona, Spain