S Weiss1, A Van Egmond-Fröhlich1, N Hofer2, A Pfleger2, R Rath3, R Schwarz4, H Kurz5, V Waibel6, H Kenzian7, E Kommer8, F Wadlegger9, W Stelzl10, B Keck11, I Grigorow12, R Kerbl13, W Sauseng14, T Frischer13, E Eber2, G Bernert1. 1. Department of Pediatrics, Kaiser Franz Josef Hospital, Vienna, Austria. 2. Department of Pediatrics, Medical University of Graz, Graz, Austria. 3. Department of Pediatrics, Hospital Moedling, Moedling, Austria. 4. Department of Pediatrics, Women's and Children's Hospital Linz, Linz, Austria. 5. Department of Pediatrics, SMZ Ost Danube Hospital, Vienna, Austria. 6. Department of Pediatrics, Medical University of Innsbruck, Innsbruck, Austria. 7. Department of Pediatrics, Hospital Villach, Villach, Austria. 8. Department of Pediatrics, Hospital Mistelbach, Mistelbach, Austria. 9. Department of Pediatrics, Clinical Center Klagenfurt, Klagenfurt, Austria. 10. Department of Pediatrics, Hospital Feldkirch, Feldkirch, Austria. 11. St. Anna Children's Hospital, Vienna, Austria. 12. Department of Pediatrics, Hospital Leoben, Leoben, Austria. 13. Department of Pediatrics, Wilhelminenspital, Vienna, Austria. 14. Medical Services, Youth and Child Welfare Services, City of Graz, Austria.