title: Differential diagnosis in pulmonary shadows observed on X-ray films.
authors.forename: H
authors.initials: H
authors.lastname: MARK
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008910:Minnesota; D011859:Radiography; D014962:X-Ray Film; D014965:X-Rays / Q000175:diagnosis
keywords: LUNGS/roentgenography; ROENTGEN RAYS/diagnosis, diagnostic