title: Ultrastructural abnormalities in young patients with recurrent respiratory infections.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D002923:Cilia / Q000648:ultrastructure; D003550:Cystic Fibrosis / Q000150:complications; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007619:Kartagener Syndrome / Q000473:pathology; D009092:Mucous Membrane / Q000648:ultrastructure; D012137:Respiratory System / Q000648:ultrastructure; D012141:Respiratory Tract Infections / Q000209:etiology / Q000382:microbiology / Q000473:pathology*