Subhash, H S A comparative study on idiopathic pulmonary fibrosis and secondary diffuse parenchymal lung disease. [electronic resource] - Indian journal of medical sciences May 2004 - 185-90 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0019-5359 Subjects--Topical Terms: Diagnosis, DifferentialFemaleHumansLung Diseases--diagnosisMaleMiddle AgedPulmonary Fibrosis--diagnosis