Survival after resection of perihilar cholangiocarcinoma in patients with lymph node metastases. (April 2017) - Buettner, S.; Pawlik, T.; van Vugt, J.; Gaspersz, M.; Coelen, R.; Margonis, G.; Ethun, C.; Maithel, S.; Poultsides, G.; Tran, T.; Idrees, K.; Isom, C.; et al.