title: From FAB to 2008 WHO classification: the wide heterogeneity of refractory anemia subtype among different countries.
authors.forename: Massimo
authors.initials: M
authors.lastname: Breccia
mesh_terms: D000753:Anemia, Refractory / Q000145:classification* / Q000175:diagnosis*; D006801:Humans; D007390:International Agencies; D014944:World Health Organization