Effect of structured use of preoperative portal vein embolization on outcomes after liver resection of perihilar cholangiocarcinoma oleh L. C. Franken, F. Rassam, K. P. van Lienden, R. J. Bennink, M. G. Besselink, O. R. Busch, J. I. Erdmann, T. M. vanGulik, P. B. Olthof