title: Editorial.
authors.forename: Joseph K
authors.initials: JK
authors.lastname: Han
mesh_terms: D002908:Chronic Disease; D004724:Endoscopy; D006801:Humans; D012220:Rhinitis / Q000209:etiology / Q000503:physiopathology / Q000628:therapy; D012852:Sinusitis / Q000209:etiology / Q000503:physiopathology / Q000628:therapy