1. Department of Medical Biology; Amsterdam UMC, University of Amsterdam; Amsterdam Netherlands
2. Department of Obstetrics and Gynaecology; Queen Charlotte’s and Chelsea Hospital, Imperial College London; London UK
3. Department of Obstetrics and Gynaecology; Amsterdam UMC, University of Amsterdam; Amsterdam Netherlands
4. Medical Library; Amsterdam UMC, University of Amsterdam; Amsterdam Netherlands
5. Department of Clinical Epidemiology, Biostatistics and Bioinformatics; Amsterdam University Medical Centers, University of Amsterdam; Amsterdam Netherlands
6. Department of Obstetrics and Gynaecology; Academic Medical Center; Amsterdam Netherlands