Selective or routine antibiotic prophylaxis in biliary surgery?

1. Martinez-Sarmiento, J.
2. Ortiz-Oshiro, E.
3. Borque-Ibarra, M.
4. Moreno-Sierra, J.
5. Fernandez-Nespral Bertrand, V.
6. Blas-Layna, J.L.
7. Alvarez-Fernandez Represa, J.