1. Global, regional, and national burden of multiple sclerosis 1990–2016: a systematic analysis for the Global Burden of Disease Study 2016;Lancet Neurol,2019
2. Global, regional, and national burden of neurological disorders during 1990–2015: a systematic analysis for the Global Burden of Disease Study 2015;Lancet Neurol,2017
3. Socioeconomic factors in childhood and the risk of multiple sclerosis;Nielsen;Am J Epidemiol,2013
4. Social consequences of multiple sclerosis (1): early pension and temporary unemployment—a historical prospective cohort study;Pfleger;Mult Scler,2010
5. Epidemiological studies in Upernavik District, Greenland. Incidence of some chronic diseases 1950-1974;Kromann;Acta Neurol Scand,1980