1. Department of Clinical Research, Prenatal Medicine, Inselspital Bern Universitatsklinik fur Frauenheilkunde, Bern, Switzerland
2. Obstetrics and Gynecology, Private Centre "Diagnostica ecografica e prenatale Aniello Di Meglio s.r.l.", Naples, Italy
3. OB/GYN, University of Bern, Bern, Switzerland
4. OB & GYN, Inselspital, Bern, Switzerland