Article History
Received: 18 September 2018
Revised: 21 December 2018
Accepted: 21 December 2018
First Online: 4 January 2019
Conflicts of interest
: Hans-Peter Hartung has received fees for consulting, serving on steering committees and data monitoring committees from Bayer Healthcare, Biogen, GeNeuro, Medimmune, Merck, Novartis, Roche, Sanofi Genzyme, Teva, with approval by the Rector of Heinrich-Heine-University. Jonas Graf has no conflicts of interest. David Kremer has received compensation for speaking for Grifols SA.