Prognostic signifance of intraperitoneal free cancer cells obtained by laparoscopic peritoneal lavage in patients with gastric cancer - Ribeiro Junior, Ulysses; Gama Rodrigues, Joaquim José; Safatle-Ribeiro, Adriana V; Bitelman, Bernardo; Ibrahim, Roberto E; Ferreira, Marcos B; Laudanna, Antônio Atílio; Pinotti, Henrique Walter (Journal of Gastrointestinal Surgery, 1998)