Hobart, JC; Riazi, A; Lamping, DL; Fitzpatrick, R; Thompson, AJ; (2004) Improving the evaluation of therapeutic interventions in multiple sclerosis: development of a patient-based measure of outcome. Health technology assessment (Winchester, England), 8 (9). 1-+. ISSN 1366-5278 https://researchonline.lshtm.ac.uk/id/eprint/6250