1. Centre de Référence des Syndromes Hyperéosinophiliques, U1286 Inserm INFINITE, CHU Lille Université de Lille Lille France
2. CHU Nantes, UMR 1280 PhAN, INRA Nantes Université Nantes France
3. Saint‐Louis Hospital Paris University Paris France
4. Pfizer Inc. Groton CT USA
5. Pfizer Ltd. Surrey UK
6. Department of Dermatology University of Montpellier Montpellier France
7. Pfizer Inc. Paris France
8. University Hospital of Brest Brest France
9. Department of Allergy and Clinical Immunology Hospices Civils de Lyon, Centre Hospitalier Lyon‐Sud Pierre Bénite France
10. Department of Dermatology and Pediatric Dermatology, National Reference Center for Rare Skin Disorders, Hôpital Saint‐André Université de Bordeaux, CNRS, UMR5164, Immuno‐Dermatology Bordeaux France
11. Department of Dermatology and Allergology, Tenon Hospital, AP‐HP Sorbonne Université Paris France