10. Chest x-ray (CXR) or computed tomography CT within 4 weeks prior to Day 1 with no evidence of pulmonary congestion, pleural effusions, pulmonary fibrosis, or significant emphysema. If results are questionable, patients should have additional lung function testing to exclude clinically relevant restriction or obstruction. Patients must have a forced expiratory volume (FEV-1) and Diffusing Capacity of the Lung for Carbon Monoxide (DLCO) of at least 65% and 50% of expected, respectively.