1. Institute of Pathology University Medical Center Hamburg‐Eppendorf Hamburg Germany
2. Airway Research Center North (ARCN) German Center for Lung Research (DZL) Hamburg Germany
3. Institute for Epidemiology University Medical Hospital Schleswig‐Holstein Kiel Germany
4. Department of Pathology & Cytology School of Medicine Duzce University Duzce Turkey
5. Pathology, Research Center Borstel Leibniz Lung Center Borstel Germany