論文（英文）
Impact of advanced age on survival in patients undergoing resection of hepatocellular carcinoma: Report of a Japanese nationwide survey
Kaibori M, Yoshii K, Yokota I, Hasegawa K, Nagashima F, Kubo S, Kon M, Izumi N, Kadoya M, Kudo M, Kumada T, Sakamoto M, Nakashima O, Matsuyama Y, Takayama T, Kokudo N; Liver Cancer Study Group of Japan. Impact of advanced age on survival in patients undergoing resection of hepatocellular carcinoma: Report of a Japanese nationwide survey. Annals of Surgery 2019; 269(4): 692-699.