1. Department of Clinical Sciences Lund, Respiratory Medicine and Allergology Lund University Lund Sweden
2. Center for Primary Health Care Research Department of Clinical Sciences Malmö Lund University Lund Sweden
3. Division of ENT Diseases Department of Clinical Science, Intervention and Technology Karolinska Institutet Stockholm Sweden
4. Department of Microbiology Immunology & Transplantation KU Leuven Catholic University of Leuven Leuven Belgium
5. Department of Respiratory Medicine First Faculty of Medicine Charles University and Thomayer Hospital Prague Czech Republic
6. Department of Experimental Medical Science, Cell and Tissue biology Lund University Lund Sweden
7. Department of Otorhinolaryngology Head & Neck Surgery Institute of Clinical Sciences Skane University Hospital Lund Sweden