Active, Not Recruiting Reversal of Preneoplastic Metaplasia in the Stomach With MEK Inhibitor NCT04454476 Conditions Digestive System Diseases, Digestive System Neoplasms, Gastric Cancer, +11 more Locations Nagasaki University Hospital — Nagasaki, Japan Nihon University School of Medicine — Tokyo, Japan University of Tokyo Medical Center — Tokyo, Japan View Trial Details