Varricchio L, Geer EB, Martelli F, Mazzarini M, Funnell A, Bieker JJ, Papayannopoulou T, Migliaccio AR. Patients with hypercortisolemic Cushing disease possess a distinct class of hematopoietic progenitor cells leading to erythrocytosis. Haematologica 2023;108(4):1053-1067; https://doi.org/10.3324/haematol.2021.280542.