title: The roles of vitamin D, temperature, and viral infections in seasonal risk of acquiring asthma.
authors.forename: William B
authors.initials: WB
authors.lastname: Grant
mesh_terms: D000328:Adult; D001249:Asthma / Q000209:etiology / Q000517:prevention & control*; D001990:Bronchiolitis, Viral / Q000150:complications* / Q000517:prevention & control; D019587:Dietary Supplements; D005260:Female; D006801:Humans; D007223:Infant; D011247:Pregnancy; D018357:Respiratory Syncytial Virus Infections / Q000150:complications / Q000517:prevention & control*; D012621:Seasons; D014807:Vitamin D / Q000627:therapeutic use*
chemical_list: D014807:Vitamin D