1. From the Clinical Laboratory (Drs Kanamoto and Shimoda) and Pathology (Drs Nakanishi and Ochiai) Divisions, the Departments of Internal Medicine (Dr Yamaguchi) and Surgery (Drs Tachimori, Kato, and Watanabe), National Cancer Center Hospital and Research Institute, Tokyo, Japan.
2. Reprints: Y. Nakanishi, MD, Pathology Division, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.