title: Nordic MS Epidemiology. Introduction.
authors.affiliation: Section of Clinical Neuroscience and Rehabilitation, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. oluf.andersen@neuro.gu.se.
authors.forename: O
authors.initials: O
authors.lastname: Andersen
mesh_terms: D059647:Gene-Environment Interaction; D006801:Humans; D009103:Multiple Sclerosis / Q000453:epidemiology* / Q000235:genetics; D012307:Risk Factors; D012537:Scandinavian and Nordic Countries / Q000453:epidemiology