1. ; Nijmegen Center for Mitochondrial Disorders at the Department of Pediatrics; University Medical Center Nijmegen; Nijmegen The Netherlands
2. ; Nijmegen Center for Mitochondrial Disorders, Department of Pediatrics; University Medical Center Nijmegen; PO Box 9101, Geert Grooteplein 20 Nijmegen 6500 HB The Netherlands
3. ; University Children's Hospital Innsbruck; Innsbruck
4. Children's Hospital; Salzburg Austria
5. ; Department of Medical Biochemistry and Medical Biology; University of Bari; Bari Italy