[1] Univ Hosp Heidelberg, Metab Ctr, Ctr Paediat & Adolescent Med, Heidelberg, Germany
[2] Univ Zurich, Univ Childrens Hosp Zurich, Div Metab, Zurich, Switzerland
[3] Univ Zurich, Univ Childrens Hosp Zurich, Childrens Res Ctr, Zurich, Switzerland
[4] Mayo Clin, Dept Clin Genom, Rochester, MN USA
[5] Mayo Clin, Dept Lab Med & Pathol, Rochester, MN USA
[6] Mayo Clin, Dept Neurol, Div Child & Adolescent Neurol, Rochester, MN USA
[7] Mayo Clin, Dept Pediat, Rochester, MN USA
[8] Med Univ Innsbruck, Inst Human Genet, Innsbruck, Austria
[9] UCL Great Ormond St Inst Child Hlth, Mitochondrial Res Grp, London, England
[10] Great Ormond St Hosp Children NHS Fdn Trust, Metab Unit, London, England
[11] Univ Hosp Heidelberg, Metab Ctr, Ctr Paediat & Adolescent Med, D-69120 Heidelberg, Germany