University Hospital Berne (Insel) and Zieglerspital Berne, Berne, Switzerland
Geneva University Hospitals and Medical Faculty of the University of Geneva, Geneva, Switzerland
Allergy Unit, Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
University of Zurich, Zurich, Switzerland
Churchill Hospital, Oxford Centre for Respiratory Medicine, Oxford, United Kingdom
Cantonal Hospital Munsterlingen, Departement of Internal Medicine, Pulmonary Division, Munsterlingen, Switzerland
University Hospital Zurich, Pulmonary Division, Zurich, Switzerland
University Hospital Zurich, Division of Rheumatology, Zurich, Switzerland
University Hospital Zurich, Ophthalmic Clinic, Zurich, ZH, Switzerland
University Hospital of Zurich, Departmente of Visceral and Transplantation Surgery, Zurich, Switzerland
University of Zurich, Zurich, Switzerland
University Hospital of Zurich, Zurich, Switzerland
University Hospital of Gent, Gent, Belgium
University Hospital Mainz, Mainz, Germany
University Hospital of Marseille, Marseille, France
University Hospital Zurich, Ophthalmic Clinic, Zurich, ZH, Switzerland