1. Department of Research and Development; DDL Diagnostic Laboratory; Rijswijk the Netherlands
2. Department of Epidemiology and Biostatistics; VU University Medical Centre; Amsterdam the Netherlands
3. Institut Clinic of Gynecology, Obstetrics and Neonatology; Hospital Clínic-Institut d′Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS); Barcelona Spain
4. Department of Pathology; CRESIB (Centre de Recerca en Salut Internacional de Barcelona)-Hospital Clínic; Barcelona Spain
5. Division of Cancer Epidemiology and Genetics; National Cancer Institute; Bethesda MD USA
6. Department of Obstetrics & Gynaecology; Erasmus University Medical Center; Rotterdam the Netherlands
7. Division of Woman and Baby; Gynaecological Oncology; University Medical Centre Utrecht; Utrecht the Netherlands
8. Department of Obstetrics and Gynaecology; Reinier de Graaf Groep; Delft the Netherlands
9. Department of Gynaecology; Roosevelt Kliniek; Leiden the Netherlands