1. Department of Obstetrics and Gynaecology; Radboud University Medical Center; 6500 HB Nijmegen The Netherlands
2. Department of Pathology; VU University Medical Center; 1007 MB Amsterdam The Netherlands
3. Department of Pathology; Radboud University Medical Center; 6500 HB Nijmegen The Netherlands
4. Department for Health Evidence; Radboud University Medical Center; 6500 HB Nijmegen The Netherlands
5. Department of Pathology; Erasmus MC, University Medical Center; 3000 CA Rotterdam The Netherlands
6. Department of Medical Microbiology; Radboud University Medical Center; 6500 HB Nijmegen The Netherlands