Development and expert refinement of a stratified framework for progression independent of relapse activity (PIRA) in multiple sclerosis.

Hamdy E, Talaat F, Ramadan I, Oertel F C, Bennett JL, Abousteit A, Almashad SS, Zeineddine M, Hassan A, Said SM, et al.

Clin Neurol Neurosurg. 2026 Apr 23; 267:109430. PMID: 42035653. Abstract