[1] Metab Dis Ctr Munich Schwabing, D-80804 Munich, Germany
[2] Inst Clin Chem Mol Diagnost & Mitochondrial Genet, Munich, Germany
[3] Univ Munich, Childrens Hosp, D-8000 Munich, Germany
[4] Tech Univ Munich, D-8000 Munich, Germany
[5] Univ Munich, Genzentrum, Munich, Germany
[6] Univ Munich, Friedrich Baur Inst, Munich, Germany
[7] John F Kennedy Inst, DK-2600 Glostrup, Denmark
[8] Univ Illinois, Dept Pediat, Chicago, IL 60680 USA
[9] Univ Illinois, Dept Neurol, Chicago, IL 60680 USA
[10] Univ Tubingen, Childrens Hosp, Dept Neuropediat, D-7400 Tubingen, Germany
[11] Natl Inst Publ Hlth, Budapest, Hungary
[12] Semmelweis Univ, Dept Pediat, H-1085 Budapest, Hungary
[13] McGill Univ, Montreal Neurol Inst, Montreal, PQ H3A 2T5, Canada
[14] McGill Univ, Dept Human Genet, Montreal, PQ H3A 2T5, Canada