[1] Univ Innsbruck, Inst Med Biol & Human Genet, A-6020 Innsbruck, Austria
[2] Univ Heidelberg, Childrens Hosp, Div Metab & Endocrine Dis, D-6900 Heidelberg, Germany
[3] Univ Vienna, Childrens Hosp, Vienna, Austria
[4] Lab Stoffwechselgenet, Munich, Germany