title: Cluster studies in multiple sclerosis.
authors.affiliation: Department of Public Health, University of Bergen, Norway.
authors.forename: T
authors.initials: T
authors.lastname: Riise
mesh_terms: D016022:Case-Control Studies; D016000:Cluster Analysis; D005069:Evaluation Studies as Topic; D006801:Humans; D009103:Multiple Sclerosis; D013029:Space-Time Clustering; D013223:Statistics as Topic