Carbohydrate antigen 195 (CA 195) in the sera of patients with esophageal, hepatic and biliary tract carcinomas [1]

1. Andicoechea, A.
2. Vizoso, F.
3. Alexandre, E.
4. Rodriguez, J.C.
5. Quintela, I.
6. Allende, M.
7. Ruibal, A.