論文（英文）
Impact of histologically confirmed lymph node metastases on patient survival after surgical resection for hepatocellular carcinoma: report of a Japanese nationwide survey.
Hasegawa K, Makuuchi M, Kokudo N, Izumi N, Ichida T, Kudo M, Ku Y, Sakamoto M, Nakashima O, Matsui O, Matsuyama Y. Impact of histologically confirmed lymph node metastases on patient survival after surgical resection for hepatocellular carcinoma: Report of a Japanese nationwide survey. Annals of Surgery 2014; 259(1): 166-170.