Clinical, Endoscopic, and Histopathological Features of HER2 Expression and Two-Year Survival in Gastric Adenocarcinoma - Deka Larasati; Marcellus Simadibrata; Nur Rahadiani; Ikhwan Rinaldi; Ruswhandi -; Edi Mulyana; Lianda Siregar (The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, 2026)