Pulitan? C, Bodingbauer M, Aldrighetti L, de Jong MC, Castillo F, Schulick RD, Parks RW, Choti MA, Wigmore SJ, Gruenberger T, Pawlik TM. Liver resection for colorectal metastases in presence of extrahepatic disease: results from an international multi-institutional analysis. Ann Surg Oncol. 2011 May; 18(5):1380-8.