Tartu University Clinic, Lungs Clinic, Tartu, Estonia
The centre of the investigation in treatment of allergic disease, Riga, Latvia
Kaunas Medical University Hospital, Department of Pulmonology and Immunology, Kaunas, Lithuania
University Hospital Lausanne (CHUV), Lausanne, Vaud, Switzerland
Lungenzentrum Hirslandenklinik Zuerich, Zuerich, Switzerland
Kantonsspital St. Gallen, St. Gallen, Switzerland
Dept. of Dermatology, USZ, Zuerich, Switzerland
Dept. of Oncology, USZ, Zuerich, Switzerland
Centre Pluridisciplinaire d'Oncologie & LICR, CHUV, Lausanne, Vaude, Switzerland
Dept. of Dermatology, Venerology and Allergy, Berlin, Germany
University Hospital of Zürich, Zürich, Switzerland