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r values for dose–response relationships between bone marrow absorbed dose and decrease in platelet counts when using planar method and hybrid methods for treatment fractions 1 and 2. (A) r values when all patients are included. (B) r values for patients with skeletal metastases. (C) r values for patients without skeletal metastases. *P < 0.05. **P < 0.01. ***P < 0.001.
