Health-related quality of life in multiple sclerosis: Direct and indirect effects of comorbidity.
Berrigan LI, Fisk JD, Patten SB, Tremlett H, Wolfson C, Warren S, Fiest KM, McKay KA, Marrie R A, CIHR Team in the Epidemiology and Impact of Comorbidity on Multiple Sclerosis(ECoMS)
Neurology. 2016 Mar 9. Epub 1969 Dec 31. PMID: 26962068.Abstract