[1] Goethe Univ Frankfurt, Dept Obstet & Gynecol, Ctr Ultrasound & Prenatal Med, Buergerhosp, Frankfurt, Germany
[2] Goethe Univ Frankfurt, Clementine Kinderhosp Frankfurt, Dr Senckenberg Fdn, Frankfurt, Germany
[3] Philipps Univ Marburg, Ctr Mother & Child, Marburg, Germany
[4] Clara Angela Fdn, Witten, Germany
[5] Clara Angela Fdn, Berlin, Germany