1. Department of Obstetrics and Gynaecology; Radboud University Medical Center; Nijmegen the Netherlands
2. Department of Health Evidence; Radboud University Medical Center; Nijmegen the Netherlands
3. Department of Operating Rooms; Radboud University Medical Center; Nijmegen the Netherlands
4. Department of Obstetrics and Gynaecology; Jeroen Bosch Hospital; 's-Hertogenbosch the Netherlands
5. Department of Medical Microbiology; Radboud University Medical Center; Nijmegen the Netherlands