Development of a preoperative risk score for postoperative mortality after liver resection for presumed perihilar cholangiocarcinoma. (April 2016) - Wiggers, J.K.; Groot Koerkamp, B.; Cieslak, K.P.; Doussot, A.; Allen, P.J.; Besselink, M.G.; Busch, O.R.; D'Angelica, M.I.; DeMatteo, R.P.; Gouma, D.J.; Kingham, T.P.; van Gulik, T.M.; et al.