Article History
First Online: 4 March 2019
Compliance with Ethical Standards
:
: No sources of funding were used to assist in the preparation of this review.
: Katy Murray has received financial support from Merck Serono, Biogen, Genzyme Sanofi, Roche and Novartis pharmaceuticals for scientific meeting attendance and consultation fees. David Hunt and Babak Soleimani have no conflicts of interest relevant to this review.