title: Smoking exposure, 17q21 variants, and early-onset asthma.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Morita
authors.forename: Ryozo
authors.initials: R
authors.lastname: Nagai
mesh_terms: D017668:Age of Onset; D001249:Asthma / Q000235:genetics*; D002886:Chromosomes, Human, Pair 17 / Q000235:genetics*; D004781:Environmental Exposure / Q000009:adverse effects; D006801:Humans; D020641:Polymorphism, Single Nucleotide; D012907:Smoking / Q000009:adverse effects*; D014028:Tobacco Smoke Pollution / Q000009:adverse effects*
chemical_list: D014028:Tobacco Smoke Pollution