[1] Univ Zurich, Univ Childrens Hosp Zurich, Childrens Res Ctr, Div Metab, Steinwies Str 75, CH-8032 Zurich, Switzerland
[2] Univ Childrens Hosp Zurich, Dept Psychosomat & Psychiat, Steinwies Str 75, CH-8032 Zurich, Switzerland
[3] Univ Zurich, Div Child & Adolescent Hlth Psychol, Dept Psychol, Binzmuhle Str 14,Box 8, CH-8050 Zurich, Switzerland
[4] Justus Liebig Univ Giessen, Dept Child Neurol, Giessen, Germany
[5] Univ Med Ctr Mainz, Ctr Pediat & Adolescent Med, Villa Metab, Mainz, Germany
[6] Paracelsus Med Univ, Inst Inherited Metab Dis, Dept Pediat, Salzburg, Austria
[7] Med Univ Vienna, Dept Paediat & Adolescent Med, Vienna, Austria
[8] LKH Bregenz, Dept Paediat, A-6900 Bregenz, Austria
[9] Vorarlberg Univ Appl Sci, Competence Area Healthcare & Nursing, Hochschul Str 1, A-6850 Dornbirn, Austria