1. Division of Immunology, University Children's Hospital Zurich and Children's Research Centre, University Zurich, Zurich
2. Division of Allergology, University Hospital Berne, Berne
3. Division of Immunology and Allergology, University Hospital Geneva, Geneva
4. Division of Infectious Diseases, University Children's Hospital Berne, Berne
5. Division of Haematology and Central Haematology Laboratory, Luzerner Kantonsspital and University of Berne, Berne
6. Division of Oncology/Haematology, Children's Hospital Lucerne, Lucerne
7. Division of Immunology, University Hospital Zurich, Zurich
8. Division of Infectious Diseases, University Children's Hospital Basel
9. IZZ Immunology-Zentrum Zürich, Zurich
10. Division of Immunology and Allergology, Spital Tiefenau Berne, Berne
11. Division of Immunology, University Children's Hospital Geneva, Geneva
12. Immunodeficiency Clinic, Medical Outpatient Unit and Immunodeficiency Laboratory, Department of Biomedicine, University Hospital Basel, Basel, Switzerland