[1] Med Univ Lubeck, Dept Pediat, D-23538 Lubeck, Germany
[2] Univ Hamburg Altona, Childrens Hosp, Hamburg, Germany
[3] City Hosp Wolfsburg, Wolfsburg, Germany
[4] Univ Hosp Hamburg Eppendorf, Dept Androl, Hamburg, Germany
[5] Med Univ Lubeck, Dept Obstet & Gynecol, D-23538 Lubeck, Germany