Fig. 2From: Patterns of hydroxyurea use and clinical outcomes among patients with polycythemia vera in real-world clinical practice: a chart reviewMost recent laboratory values among patients currently using HU (n = 1080). Hct hematocrit, HU hydroxyurea, WBC white blood cell. Hct ≥45 %, WBC counts >10 × 109/L, and platelet counts >400 × 109/L, were all considered elevated values for patients with PVBack to article page