1. Department of Obstetrics and Gynecology; Algemeen Ziekenhuis Sint-Lucas; Gent; Belgium
2. Department of Obstetrics and Gynecology; Skåne University Hospital Malmö, Lund University; Malmö, Sweden
3. Department of Pathology; Sint Maarten Ziekenhuis Campus Rooienberg; Duffel; Belgium
4. Department of Obstetrics and Gynecology; San Gerardo Universita di Milano; Monza; Italy
5. Department of Obstetrics and Gynecology; Università Cattolica del Sacro Cuore; Rome; Italy
6. Department of Obstetrics and Gynecology; Universitaire Ziekenhuizen Leuven; Leuven; Belgium