From: Arsenic trioxide and all-trans retinoic acid (ATRA) treatment for acute promyelocytic leukemia in all risk groups: study protocol for a randomized controlled trial
White blood cell (WBC) counts
Dose of hydroxyurea
5–10 × 109/L
0–-1 g/day
10–20 × 109/L
1.0–2.0 g/day
20–40 × 109/L
2.0–4.0 g/day
≥ 40 × 109/L
4.0 g/day