title: Methodologic considerations in trials assessing prevention of asthma exacerbation by vitamin D supplementation.
authors.forename: Alireza
authors.initials: A
authors.lastname: Ahmadvand
authors.forename: Behzad
authors.initials: B
authors.lastname: Darabi
mesh_terms: D001249:Asthma / Q000503:physiopathology* / Q000517:prevention & control*; D019587:Dietary Supplements; D005260:Female; D006801:Humans; D008297:Male; D012141:Respiratory Tract Infections / Q000150:complications*; D014807:Vitamin D / Q000008:administration & dosage*
chemical_list: D014807:Vitamin D