Detection of occult lymph node tumor cells in node-negative gastric cancer patients - Pereira, Marina Alessandra; Pertille, Marcus Fernando Kodama; Dias, Andre Roncon; Yagi, Osmar Kenji; Faraj, Sheila Friedrich; Zilberstein, Bruno; Cecconello, Ivan; Mello, Evandro Sobroza de; Ribeiro Junior, Ulysses (Abcd-arquivos brasileiros de cirurgia digestiva-brazilian archives of digestive surgery, 2017)