[1] McGill Univ, Montreal Neurol Inst Hosp, Dept Neurol & Neurosurg, Montreal, PQ, Canada
[2] Univ Sydney, Brain & Mind Ctr, Sydney, NSW, Australia
[3] Royal Prince Alfred Hosp, Dept Neurol, Sydney, NSW, Australia
[4] Hanyang Univ, Coll Med, Dept Neurol, Seoul, South Korea
[5] Umea Univ, Dept Clin Sci, Neurosci, Umea, Sweden
[6] Univ Torino, ALS Ctr, Dept Neurosci Rita Levi Montalcini, Turin, Italy
[7] AOU Citta Salute & Sci Torino, SC Neurol 1U, Turin, Italy
[8] Univ Med Ctr Utrecht, UMC Utrecht Brain Ctr, Dept Neurol, Utrecht, Netherlands
[9] Katholieke Univ Leuven, Dept Neurosci, Lab Neurobiol, Leuven, Belgium
[10] Leuven Brain Inst, VIB, Ctr Brain & Dis Res, Leuven, Belgium
[11] Univ Hosp Leuven, Dept Neurol, Leuven, Belgium
[12] Kings Coll London, Maurice Wohl Clin Neurosci Inst, Dept Basic & Clin Neurosci, London, England
[13] Univ Chile, Fac Med, Dept Neurol Sur, Santiago, Chile
[14] Gerosci Ctr Brain Hlth & Metab, Santiago, Chile
[15] Eleanor & Lou Gehrig ALS Ctr, Neurol Inst, New York, NY USA