Author/Authors :
losada, hector universidad de la frontera - medical school - surgery department, Temuco, Chile , losada, hector clínica alemana de temuco - hepato-pancreatic and biliary surgery department, Temuco, Chile , villaseca, miguel universidad de la frontera - pathology department, Temuco, Chile , vivallo, carolina universidad de la frontera - pathology department, Temuco, Chile , lópez, maite universidad de la frontera - medical school - surgery department, Temuco, Chile
