Tumor markers (cea, ca 19-9, ca 72-4) in pancreatic and ampullary cancer - Montagnini, A L; Natal, S R B; Simon, L; Cubrusly, M S; Sato, M K; Jukemura, J; Machado, Marcel Cerqueira César; Pinotti, Henrique Walter (Inaugural World Congress of the International Hepato-Pancreato-Biliary Association, 1994)