[1] Copenhagen Univ Hosp Hvidovre, DRCMR, DK-2650 Hvidovre, Denmark
[2] Univ Kiel, Dept Neurol, D-2300 Kiel, Germany
[3] Hosp Nacl Paraplej, Toledo, Spain
[4] Univ British Columbia, Dept Neurol, Vancouver, BC V5Z 1M9, Canada
[5] Univ Messina, Dept Neurosci Psychiat & Anesthesiol, Messina, Italy
[6] Natl Inst Neurol Disorders & Stroke, Human Cort Physiol & Stroke Neurorehabil Sect, NIH, Bethesda, MD USA
[7] Univ Freiburg, Dept Neuropediat & Muscle Disorders, D-79106 Freiburg, Germany
[8] Univ Bern, Inselspital, Dept Neurol, CH-3010 Bern, Switzerland
[9] Univ Grad Sch Med, Human Brain Res Ctr, Kyoto, Japan
[10] Univ Siena, Dipartimento Neurosci, Sez Neurol & Neurofisiol Clin, Policlin Le Scotte, I-53100 Siena, Italy
[11] Univ Western Australia, Ctr Neuromuscular & Neurol Disorders, Nedlands, WA 6009, Australia
[12] Catholic Univ, Inst Neurol, Pol Gemelli, Italy
[13] IRCCS S Raffaele Pisana & Casa Cura S Raffaele Ca, Rome, Italy
[14] Goethe Univ Frankfurt, Dept Neurol, Frankfurt, Germany
[15] Univ Barcelona, Hosp Clin, Serv Neurol, Unitat EMG, E-08007 Barcelona, Spain