1. Division of Fetal Surgery, Department of Obstetrics and Prenatal Medicine; University of Bonn; Bonn Germany
2. Division of Prenatal Medicine and Gynecologic Sonography, Department of Obstetrics and Gynecology; University of Cologne; Cologne Germany
3. Department of Obstetrics and Gynecology; University of Tuebingen; Tuebingen Germany
4. Department of Neonatology; University of Bonn; Bonn Germany
5. Division of Pediatric Surgery; University of Bonn; Bonn Germany