論文（英文）
Report of the 20th Nationwide Follow-up Survey of Primary Liver Cancer in Japan
Kudo M, Izumi N, Kubo S, Kokudo N, Sakamoto M, Shiina S, Tateishi R, Nakashima O, Murakami T, Matsuyama Y, Takahashi A, Miyata H, Takayama T. Report of the 20th Nationwide Follow-up Survey of Primary Liver Cancer in Japan. Hepatol Res. 2020; 50(1): 15-46.