[Environmental factors in the etiology of multiple sclerosis].
D000293:Adolescent; D000328:Adult; D000349:Africa; D001208:Asia; D002648:Child; D002980:Climate; D004777:Environment; D005060:Europe; D006306:Health Surveys; D006801:Humans; D007557:Israel; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000209:etiology*; D012424:Rural Population; D012959:Socioeconomic Factors; D014505:Urban Population