Assessment of programmed death-ligand 1 expression in primary tumors and paired lymph node metastases of gastric adenocarcinoma - Coimbra, Brendha Caco; Pereira, Marina Alessandra; Cardili, Leonardo; Alves, Venancio Avancini Ferreira; Mello, Evandro Sobroza de; Ribeiro Junior, Ulysses; Ramos, Marcus Fernando Kodama Pertille (World journal of gastrointestinal oncology, 2024)