1. Institute for Epidemiology, University Medical Hospital Schleswig-Holstein, Campus Kiel, Germany. Member of the German Center for Lung Research (ARCN)
2. LungClinic Grosshansdorf, Germany. Airway Research Center North (ARCN), German Center for Lung Research (DZL)
3. German Central Committee against Tuberculosis, Berlin, Germany
4. Institution for Statutory Accident Insurance and Prevention in the Health and Welfare Services (BGW), Hamburg, Germany
5. Institute for Health Service Research in Dermatology and Nursing, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
6. Medicine, Rheumatology, rheumatological main practice Schwerin, Germany
7. Department of Rheumatology, Clinical Immunology and Osteology, Immanuel Hospital Berlin, Germany
8. Department of Dermatology, University of Cologne, Germany
9. Psoriasis Center, Department of Dermatology, University Medical Center Schleswig-Holstein, Campus Kiel, Germany