- Pulmonary dysfunction as measured by a corrected diffusing capacity of the lung for carbon monoxide (DLCO) < 50% of predicted total lung capacity (TLC) < 30%, forced expiratory volume in 1 second (FEV1) < 30% and/or receiving supplementary continuous oxygen; the FHCRC principal investigator (PI) of the study must approve enrollment of all patients with pulmonary nodules