[1] Merck, Aubonne, Switzerland
[2] Merck KGaA, Darmstadt, Germany
[3] Rutgers State Univ, New Jersey Med Sch, Newark, NJ USA
[4] Thomas Jefferson Univ, Philadelphia, PA 19107 USA
[5] Univ Vita Salute San Raffaele, Milan, Italy
[6] Univ Toronto, St Michaels Hosp, Toronto, ON, Canada
[7] Hosp Univ Vall dHebron, Ctr Esclerosi Multiple Catalunya Cemcat, Barcelona, Spain
[8] EMD Serono Inc, Billerica, MA USA