Gallardo M, Fernandez M, Paradela A, Toldos O, Garcia-Martin R, Barrio S, Ayala R, Albizua E, Rapado I, Jimenez A, Candelas M, Gilsanz F, Martinez-Lopez J. Proteomic analysis identifies HSP70 as a novel target therapy to polycythemia vera. The gene discussed is HSPA1A; the disease is acquired polycythemia vera.