1. Department of Rheumatology and Clinical Immunology, University Clinic, Freiburg, Germany;
2. Institute of Medical Technology, University of Tampere, Tampere, Finland;
3. Laboratory of Cellular Immunology, Inserm U543, Hôpital Pitié-Salpétrière and Department of Clinical Immunology, Hôpital St Louis, Paris, France;
4. Department of Clinical Immunology, Oxford Radcliffe Hospital Trust, Oxford, United Kingdom;
5. Department of Clinical Immunology and Rheumatology, Medical School Hannover, Hannover, Germany;
6. Department of Clinical Immunology, Royal Free Hospital, London, United Kingdom;
7. Department of Clinical Immunology and Allergology, Masaryk University, St Anne University Hospital, Brno, Czech Republic;
8. Immunology Unit, Hospital Vall d′Hebron, Barcelona, Spain;
9. Erasmus Medical Center, Rotterdam, the Netherlands;
10. Children's Hospital, Technical University Dresden, Dresden, Germany;
11. Department of Pediatric Pulmonology and Neonatology, Medical School Hannover, Hannover, Germany;
12. Department of Pediatrics and Institute for Molecular Medicine Angello Nocivelli, University of Brescia, Brescia, Italy;
13. Department of Clinical Immunology, Sapienza University, Research Unit, Rome, Italy; and
14. Tampere University Hospital, Tampere, Finland