[1] Pontificia Univ Catolica Chile, Dept Cirugia Digest, Unidad Coloproctol, Santiago, Chile
[2] Pontificia Univ Catolica Chile, Dept Cirugia Digest, Unidad Nutr, Santiago, Chile
[3] Pontificia Univ Catolica Chile, Dept Cirugia Digest, Unidad Coloproctol, Santiago, Chile
[4] Pontificia Univ Catolica Chile, Dept Cirugia Digest, Unidad Cirugia Hepatobiliopancreat & Trasplante, Santiago, Chile