1 Ultrasound and Fetal Medicine Unit, Department Woman-Mother-Child, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland; School of Health Sciences (HESAV), HES-SO University of Applied Sciences and Arts, Avenue de Beaumont 21, Western Switzerland, 1011, Lausanne, Switzerland. Electronic address: leo.pomar@chuv.ch.
2 Ultrasound and Fetal Medicine Unit, Department Woman-Mother-Child, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.