Efficacy of erythroid‐stimulating agent and luspatercept in VEXAS syndrome: A multicenter retrospective study by the FRENVEX group - Maël Heiblig; Vincent Jachiet; Jérôme Hadjadj; Lin Pierre Zhao; Thibault Comont; Hervé Lobbes; Valentin Lacombe; Anne Blandine Boutin; Joris Galland; Benjamin Terrier; Sophie Georgin‐Lavialle; Pierre Fenaux; et al. (HemaSphere, 2025)