1. Department of Dermatology Saint-Louis Hospital, AP-HP Paris France
2. CHU Lille, Institut d’Immunologie National Reference Centers for Hypereosinophilic syndromes, U1286 – INFINITE – Institute for Translational Research in Inflammation Inserm Univ. Lille Lille F-59000 Lille France
3. Department of Internal Medicine Ambroise-Paré Hospital Boulogne-Billancourt France
4. CHU Lille, Univ. Lille Service de Dermatologie, U1286 Inserm INFINITE Institute for Translational Research in Inflammation F-59000 Lille
5. Service de Rhumatologie Centre de Référence National des Maladies Auto-Immunes Systémiques Rares, CNR RESO, Hôpitaux universitaire de Strasbourg Strasbourg France
6. Department of Internal Medicine CHU de Valence Valence France
7. Department of Internal Medicine and Clinical Immunology CHRU de Nancy, Université de Lorraine CNRS UMR 7365, IMoPA Nancy France
8. Department of Internal Medicine CH de Bayonne Bayonne France
9. Univ. Lille, Inserm, CHU Lille, Service de Médecine Interne et Immunologie Clinique U1286 – INFINITE – Institute for Translational Research in Inflammation F-59000 Lille France
10. INSERM U976 Paris France
11. Université Paris Cité Paris France
12. Department of Internal Medicine CHU Nantes Hôtel Dieu Nantes France
13. Rheumatology Clinic Kantonsspital St. Gallen St. Gallen Switzerland
14. Department of Dermatology CHU d’Angers Angers France
15. Department of Clinical Immunology Saint-Louis Hospital, AP-HP Paris France
16. Department of Dermatology CHU de Caen Caen France
17. Pharmacogenomics and Oncogenetics Saint-Louis Hospital, AP-HP Paris France
18. Hematology Laboratory and Saint-Louis Hospital AP-HP Paris France
19. Department of Internal Medicine CHU de Dax Dax France
20. Department of Internal Medicine and Clinical Immunology Centre Hospitalier de Vichy Vichy France
21. Department of Hematology CHRU Bretonneau Tours France
22. Department of Clinical Immunology CHU Poitiers Poitiers France
23. Department of Clinical Immunology CH Niort Niort France
24. Department of Internal Medicine CHU de Reims Reims France
25. Department of Internal Medicine CHU Tenon Paris France
26. Department of Internal Medicine Hôpital Foch Suresnes France
27. Department of Pathology Saint-Louis Hospital, AP-HP Paris France