title: Latitude and multiple sclerosis prevalence: vitamin D reduces risk of Epstein-Barr virus infection.
authors.forename: W B
authors.initials: WB
authors.lastname: Grant
mesh_terms: D020031:Epstein-Barr Virus Infections / Q000150:complications / Q000453:epidemiology* / Q000517:prevention & control; D006801:Humans; D009103:Multiple Sclerosis / Q000453:epidemiology* / Q000209:etiology / Q000378:metabolism; D015995:Prevalence; D012111:Residence Characteristics; D018570:Risk Assessment; D012307:Risk Factors; D012621:Seasons; D014466:Ultraviolet Rays; D014807:Vitamin D / Q000378:metabolism*; D014808:Vitamin D Deficiency / Q000150:complications / Q000453:epidemiology* / Q000378:metabolism
chemical_list: D014807:Vitamin D