title: Month of birth is not a definite risk factor for multiple sclerosis.
authors.affiliation: Departamento de Neurologia, Centro Hospitalar São João, Porto, Portugal.
authors.forename: Maria José
authors.initials: MJ
authors.lastname: Sá
mesh_terms: D006801:Humans; D009103:Multiple Sclerosis / Q000209:etiology*; D036801:Parturition; D012307:Risk Factors; D012621:Seasons; D013997:Time Factors