Comorbidity is associated with pain-related activity limitations in multiple sclerosis.
Fiest KM, Fisk JD, Patten SB, Tremlett H, Wolfson C, Warren S, McKay KA, Berrigan L, Marrie R, CIHR Team in the Epidemiology and Impact of Comorbidity on Multiple Sclerosis(ECoMS)
Mult Scler Relat Disord. 2015 Sep; 4(5):470-6. PMID: 26346797.Abstract