PDF (209 K) Human CD4+CD25+ T cells increase in the liver of patients with hepatocellular carcinoma: possible involvement in the escape from tumor rejection: Satoshi Yamagiwa, Takafumi Ichida, Xiu Hua Yang, Satoshi Sugahara, Toru Ishikawa, Hisami Watanabe, Yoshinobu Sato, Toru Abo, Hitoshi Asak...