Case report: Patients with positive HER-2 amplification locally advanced gastroesophageal junction cancer achieved pathologic complete response with the addition of pembrolizumab to chemotherapy plus trastuzumab as neoadjuvant therapy - Li, Huanhuan; Ren, Chao; Cui, Donghai; Wu, Tao; Nie, Zhiyong (Frontiers in Immunology, 2025)