MD, PhDHiroshima University;Hiroshima University Hospital
MD, PhDUniversity Duisburg-Essen
MDMalteser Lung and Allergy Center,
MDPneumology Praxis
MDRuhrlandklinik, University of Duisburg-Essen;University Duisburg-Essen
MDUniversity Duisburg-Essen
MDRuhr-University