Task: Answer Verification
Input (English): Question: Is serum REG4 level a predictive biomarker for the response to preoperative chemoradiotherapy in patients with pancreatic cancer?
Answer: These data demonstrated in vitro and in vivo that REG4 protein overexpression was associated with an unfavorable response to preoperative chemoradiotherapy. REG4 can clinically be used as a predictive biomarker.
Output (English): yes