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3. Transthoracic Needle Biopsy;Dahlgren,1966
4. Ten years of respiratory cytopathology at Duke University Medical Center. III. The significance of inconclusive cytopathologic diagnoses during the years 1970 to 1974;Johnston;Acta Cytol,1982
5. Clinical significance of an inconclusive cytopathologic diagnosis: A five-year experience at Duke University Medical Center. II. Analysis and follow-up of specimens from the respiratory tract;Wax;Acta Cytol,1997