1. Department of Obstetrics and Gynecology; Academic Medical Center; University of Amsterdam; Amsterdam the Netherlands
2. Department of Obstetrics and Gynecology; Twenteborg Hospital; Almelo the Netherlands
3. Department of Medical Informatics; Academic Medical Center; Amsterdam the Netherlands
4. Rijnstate Hospital; Arnhem the Netherlands
5. Department of Perinatology and Gynecology; University Medical Center Utrecht; Utrecht the Netherlands