[1] Balgrist Univ Hosp, Spinal Cord Injury Ctr, Forchstr 340, CH-8008 Zurich, Switzerland
[2] Balgrist Univ Hosp, Radiol, Zurich, Switzerland
[3] UCL, Inst Neurol, Wellcome Trust Ctr Neuroimaging, London, England
[4] UCL, UCL Inst Neurol, Dept Brain Repair & Rehabil, London, England
[5] Max Planck Inst Human Cognit & Brain Sci, Dept Neurophys, Leipzig, Germany