title: 42-year-old man with asthma symptoms and recurrent bronchitis.
authors.affiliation: Resident in Internal Medicine, Mayo School of Graduate Medical Education, Rochester, MN.
authors.forename: Benjamin R
authors.initials: BR
authors.lastname: Griffin
authors.affiliation: Resident in Internal Medicine, Mayo School of Graduate Medical Education, Rochester, MN.
authors.forename: Christopher R
authors.initials: CR
authors.lastname: Stephenson
authors.affiliation: Advisor to residents and Consultant in Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN. Electronic address: wylam.mark@mayo.edu.
authors.forename: Mark E
authors.initials: ME
authors.lastname: Wylam
mesh_terms: D000328:Adult; D000367:Age Factors; D001249:Asthma / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D029481:Bronchitis, Chronic / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D003550:Cystic Fibrosis / Q000150:complications* / Q000175:diagnosis* / Q000628:therapy; D006801:Humans; D008297:Male