title: An evaluation of supine and erect chest films in children.
mesh_terms: D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D011187:Posture; D013902:Radiography, Thoracic; D012141:Respiratory Tract Infections / Q000000981:diagnostic imaging; D013679:Technology, Radiologic