1. ; Department of Pediatrics; Friedrich-Schiller University; Jena Germany
2. ; Institute of Clinical Chemistry and Laboratory Diagnostics; Friedrich-Schiller University; Jena Germany
3. Service of Pediatrics; Biochemistry Hospital Debrousse; Lyon France
4. ; Research Unit for Molecular Medicine; Aarhus University Hospital; Aarhus Denmark
5. ; Department of Medical Genetics; Mayo Clinic; Rochester New York USA
6. Center of Metabolic Diagnostics; Reutlingen
7. Laboratory of Metabolism; Department of Pediatrics of the University; Frankfurt am Main
8. Laboratory of Metabolism; Department of Pediatrics of the University; Freiburg Germany