Kaplan-Meier survival curves for CD200 (+) patients 1A: PFS of patients with the MFI<127 was longer, compared to MFI>127 ones (p=0.046). 1B: In the patients with age ≥65 years old ,PFS of patients with MFI≥127 was much shorter, compared to MFI<127 group. (p=0.023). 1C: In the patients with age ≥65 years old ,OS of patients with MFI<127 years was better, compared to MFI≥127 group. (p=0.044).