[1] Univ Bern, Bern Univ Hosp, Inselspital, Bern, Switzerland
[2] Cleveland Clin, Mellen Ctr Multiple Sclerosis Treatment & Res, Cleveland, OH 44106 USA
[3] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[4] Univ Penn, Perelman Sch Med, Philadelphia, PA 19104 USA
[5] Biogen, Cambridge, MA USA
[6] Baylor Inst Immunol Res, Dallas, TX USA