 - Chest X-Ray: A chest X-ray or computed tomography CT scan that reveals evidence of clinically significant abnormalities not believed to be due to the presence of COPD. A chest X-ray must be taken at Visit 1 if a chest X-ray or CT scan is not available within 6 months prior to Visit 1. For subjects in Germany, if a chest X-ray or CT scan is not available in the 6 months prior to Visit 1 the subject will not be eligible for the study. 