Initial high-efficacy disease-modifying therapy in multiple sclerosis: A nationwide cohort study.

Buron MD, Chalmer TA, Sellebjerg F, Barzinji I, Christensen JR, Christensen MK, Hansen V, Illes Z, Jensen HB, Kant M, Papp V, Petersen T, Rasmussen PV, Schäfer J, Theódórsdóttir Á, Weglewski A, Sorensen PS, Magyari M.