Sustained improvement in Expanded Disability Status Scale as a new efficacy measure of neurological change in multiple sclerosis: treatment effects with natalizumab in patients with relapsing multiple sclerosis.
Phillips TJ, Giovannoni G, Lublin FD, O'Connor PW, Polman CH, Willoughby E, Aschenbach W, Pace A, Hyde R, Munschauer FE
Mult Scler. 2011 Aug; 17(8):970-9. Epub 2011 Mar 18. PMID: 21421809.Abstract