2 Department of Pulmonary Diseases and Tuberculosis, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
3 Department of Radiology and Nuclear Medicine, Amsterdam UMC, Free University Amsterdam, Cardiovascular Sciences Research Institute, Amsterdam, the Netherlands.
4 Department of Pathology, Amsterdam UMC, Free University Amsterdam, Amsterdam, the Netherlands.
5 Department of Pathology, University Hospital Giessen and Marburg, Giessen, Germany; and.
6 German Centre for Lung Research, Giessen, Germany.