Combined laparoscopic colorectal and liver resection for patients with synchronous liver metastases of colorectal origin: a retrospective, multicenter, propensity score matched study. (September 2018) - van der Poel, M.J.; Tanis, P.J.; Rijken, A.M.; Gertsen, E.C.; Ovaere, S.; Gerhards, M.F.; Marsman, H.A.; Besselink, M.G.; D'Hondt, M.; Gobardhan, P.D.