1. Department of Development and Regeneration, Faculty of Medicine; KU Leuven; Leuven Belgium
2. Department of Obstetrics and Gynecology, Division of Woman and Child; University Hospitals Leuven; Leuven Belgium
3. Feto-Maternal Medicine Unit, Department of Obstetrics and Gynecology; Centre Hospitalier Universitaire Vaudois; Lausanne Switzerland