Sa A. Wang, Robert P. Hasserjian, Wayne Tam, Albert G. Tsai, Julia T. Geyer, Tracy I. George, Kathryn Foucar, Heesun J. Rogers, Eric D. Hsi, Bryan A. Rea, Adam Bagg, Carlos E. Bueso-Ramos, Daniel A. Arber, Srdan Verstovsek, Attilio Orazi. Bone marrow morphology is a strong discriminator between chronic eosinophilic leukemia, not otherwise specified and reactive idiopathic hypereosinophilic syndrome. Haematologica 2017;102(8):1352-1360; https://doi.org/10.3324/haematol.2017.165340.