Surgery
Since the current clinical trial was for older patients, the protocol surgery was only stipulated as “surgery for curative purposes.” Surgery was performed after confirming that the following two conditions were met. (1) A CT scan performed within 7–56 days from the date of the last S-1 administration to determine that surgery for curative purposes is feasible. (2) The patient must have a white blood cell count ≥ 3,000/mm