Guillaume Lefèvre1, Félix Ackermann2, Jean-Emmanuel Kahn3. 1. French Eosinophil Network, France; CHU Lille, Institut d'Immunologie, Unité d'Immunologie Clinique, F-59000 Lille, France; Univ. Lille, U995 - LIRIC - Lille Inflammation Research International Center, F-59000 Lille, France. Electronic address: guillaume.lefevre@chru-lille.fr. 2. French Eosinophil Network, France; Service de Médecine Interne, Hôpital Foch, Suresnes, France. 3. French Eosinophil Network, France; Univ. Lille, U995 - LIRIC - Lille Inflammation Research International Center, F-59000 Lille, France; Service de Médecine Interne, Hôpital Foch, Suresnes, France.