Arm1- bevacizumab (Onbevzi) at a dose of 15 mg/kg administered as a 30-minute intravenous infusion on Day 1 of each 21-day cycle, followed by intravenous infusion of gemcitabine and docetaxel in sequence. On Day 8 of each cycle, gemcitabine and docetaxel will be administered as a 60-minute intravenous infusion.
Arm2- On Day 1 of each 21-day cycle, gemcitabine will be administered first, followed by docetaxel as an intravenous infusion. On Day 8, gemcitabine and docetaxel will be administered as intravenous infusions.