812
PHA -induced proliferation of PBMCs dropped significantly in patients who received adjuvant chemotherapy consisting of cyclophosphamide , methotrexate and fluorouracil ( CMF ) after an observation period of 6 months (P < 0.01), but not in patients under adjuvant treatment with tamoxifen only.
 ( cell type: PBMCs, None) , ( protein: PHA, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell type: PBMCs, None) , ( protein: PHA, None) 