Surgical Intervention After Zolbetuximab-Based Chemotherapy for CLDN18.2-Positive Gastric and Gastroesophageal Junction Adenocarcinoma: A Case Series. - Oiwa S; Sagawa T; Watabe H; Hirakawa M; Uesugi A; Yoshida M; Nagashima H; Fujikawa K (Journal of gastrointestinal cancer, 2026)