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.