KeyLargo: Pembrolizumab + Oxaliplatin + Capecitabine in Gastric Cancer

"For each cycle: Oxaliplatin 130 mg/m2 IV on Day1, Capecitabine 825 or 1000 mg/m2 PO, BID Days on Days1-14, Pembrolizumab 200 mg IV on Day 1.~This study has 2 parts:~1. Safety validation part: all Cycles are 21 days in length.~2. Dose Expansion part: Cycle 1 is 28 days in length. Cycle 2 and beyond are 21 days."