title: Ragweed subpollen particles reach deep into lungs.
authors: Jerry
authors: J
authors: Phelps
mesh_terms: D031164:Ambrosia; D001249:Asthma / Q000209:etiology*; D006801:Humans; D008168:Lung / Q000737:chemistry; D010316:Particle Size; D011058:Pollen / Q000009:adverse effects*; D012621:Seasons