Phase II Trial of Combination Therapy With S-1, Irinotecan, and Bevacizumab (SIRB) in Patients With Unresectable or Recurrent Colorectal Cancer

"S-1 is administered orally on days 1 to 14 of a 21-day cycle. Patients are assigned on the basis of body surface area (BSA) to receive one of the following oral doses twice daily: 40 mg (BSA \<1.25m2), 50 mg (BSA \>1.25 to \<1.50 m2), or 60 mg (BSA \>1.50 m2).~Irinotecan 150 mg/m2 is administered by intravenous infusion on day 1. Bevacizumab 7.5 mg/kg (body weight) is administered by intravenous infusion on day 1."