2. Hairy Cell Leukemia — Absolute neutrophil count ≤ 1.0 × 109/L, Hgb ≤ 10.0 g/dL or platelet count ≤ 100 × 109/L; AST/ALT ≤ 2.5 × ULN, bilirubin ≤ 2, creatinine ≤ 1.5 × ULN or calculated CrCl >50 mL/min (Cockcroft-Gault formula)