[1] Inst Alexander Fleming, Dept Gastrointestinal Med Oncol, 1180 Cramer, RA-1426 Buenos Aires, DF, Argentina
[2] Inst Alexander Fleming, Dept Surg, RA-1426 Buenos Aires, DF, Argentina
[3] Inst Alexander Fleming, Dept Radiol, RA-1426 Buenos Aires, DF, Argentina
[4] Inst Alexander Fleming, Dept Pathol, RA-1426 Buenos Aires, DF, Argentina
[5] Inst Alexander Fleming, Dept Radiat Oncol, RA-1426 Buenos Aires, DF, Argentina
[6] Inst Alexander Fleming, Dept Gastroenterol, RA-1426 Buenos Aires, DF, Argentina
[7] Inst Alexander Fleming, Dept Med Oncol, RA-1426 Buenos Aires, DF, Argentina