Merlo, Daniel, Stankovich, Jim, Darby, David, Butzkueven, Helmut, Van der Walt, Anneke, Bai, Claire, Kalincik, Tomas, Zhu, Chao, Gresle, Melissa, Lechner-Scott, Jeannette, Kilpatrick, Trevor, Barnett, Michael, Taylor, Bruce. Wolters Kluwer Health; 2021. Association between cognitive trajectories and disability progression in patients with relapsing-remitting multiple sclerosis.