Wei T, Lu J, Xiao XL, Weiss M, Popescu I, Marques HP, Aldrighetti L, Maithel SK, Pulitano C, Bauer TW, Shen F, Poultsides GA, Soubrane O, Martel G, Koerkamp BG, Itaru E, Lv Y, Zhang XF, Pawlik TM, International Intrahepatic Cholangiocarcinoma and Hepatocellular Carcinoma Study Groups, and U.S. Extrahepatic Biliary Malignancy Consortium