Crystal, Ronald G Future research directions in idiopathic pulmonary fibrosis: summary of a National Heart, Lung, and Blood Institute working group. [electronic resource] - American journal of respiratory and critical care medicine Jul 2002 - 236-46 p. digital Publication Type: Journal Article ISSN: 1073-449X Standard No.: 10.1164/rccm.2201069 doi Subjects--Topical Terms: HumansPulmonary Fibrosis--diagnosisResearch