[1] Swiss Fed Inst Technol, Inst Biomed Engn, Gloriastr 35, CH-8092 Zurich, Switzerland
[2] Univ Zurich, Gloriastr 35, CH-8092 Zurich, Switzerland
[3] Univ Zurich, Univ Hosp Zurich, Neuroimmunol & MS Res Sect, Neurol Clin, Zurich, Switzerland
[4] Univ Zurich, Univ Hosp Zurich, Clin Neurosci Ctr, Dept Neuroradiol, Zurich, Switzerland