[1] Univ Klinikum, Inst Klin Chem & Lab Diagnost, D-07747 Jena, Germany
[2] Duke Univ, Med Ctr, Ctr Human Genet, Durham, NC 27706 USA
[3] Duke Univ, Med Ctr, Dept Psychiat & Behav Sci, Durham, NC 27706 USA
[4] Graz Univ, Zentrum Med Forsch, A-8010 Graz, Austria
[5] Univ Coll Dublin, Conway Inst Biomol & Biomed Res, Dublin 2, Ireland
[6] Newcastle Univ, Mitochondrial Res Grp, Newcastle Upon Tyne, Tyne & Wear, England
[7] Newcastle Univ, Inst Human Genet, Newcastle Upon Tyne, Tyne & Wear, England
[8] St Vincents Univ Hosp, Dept Neurol, Dublin, Ireland
[9] Univ Coll Dublin, Dublin 2, Ireland
[10] Univ Sheffield, Sheffield Care & Res Ctr Motor Neuron Disorders, Acad Neurol Unit, Sheffield S10 2TN, S Yorkshire, England
[11] Univ Montreal, Notre Dame Hosp, Ctr Study Brain Dis, Montreal, PQ H3C 3J7, Canada
[12] McGill Univ, Dept Biol, Montreal, PQ H3A 1B1, Canada
[13] MRC, Amsterdam, Netherlands