Sakamoto J, Hamada C, Yoshida S, Kodaira S, Yasutomi M, Kato T, Oba K, Nakazato H, Saji S, Ohashi Y. An individual patient data meta-analysis of adjuvant therapy with uracil-tegafur (UFT) in patients with curatively resected rectal cancer. Brit J Cancer 2007; 96: 1170-7.
Kobayashi M, Oba K, Sakamoto J, Kondo K, Nagata N, Okabayashi T. Pharmacokinetic study of paclitaxel of weekly administration dose in advanced or recurrent gastric cancer patients in Japan. Gastric Cancer 2007; 10:52-7.
Ninomiya M, Kondo K, Matsuo K, Hirabayashi N, Kojima H, Kobayashi M, Kawamura S, Ando T, Musha N, Konno H, Nagata N, Usuki H, Miyashita Y, Oba K, Morita S, Sakamoto J. Multicenter Phase II Trial of Combination Chemotherapy with Weekly Paclitaxel and 5-Fluorouracil for the Treatment of Advanced or Recurrent Gastric Carcinoma. J Chemotherapy 2007; 19:444-50.
Oba K, Teramukai S, Kobayashi M, Matsui T, Kodera Y, Sakamoto J. Efficacy of Adjuvant Immunochemotherapy with Polysaccharide K for Patients with Curative Resections of Gastric Cancer. Cancer Immunol Immun 2007; 56:905-11.
Oba K, Morita S, Rahman M, Sakamoto J. Factors associated with compliance and non-compliance by physicians in a large-scale randomized clinical trial. Trials 2006; 7:26.
Oba K, Morita S, Tsuburaya A, Kodera Y, Kobayashi M, Sakamoto J. Efficacy of Adjuvant Chemotherapy Using Oral Fluorinated Pyrimidines for Curatively Resected Gastric Cancer: A Meta-Analysis of Centrally Randomized Controlled Clinical Trials in Japan. J Chemother 2006; 18: 311-7.
Sakamoto J, Morita S, Oba K, Matsui T, Kobayashi M, Nakazato H, Ohashi Y; Meta-Analysis Group of the Japanese Society for Cancer of the Colon Rectum. Efficacy of adjuvant immunochemotherapy with polysaccharide K for patients with curatively resected colorectal cancer: a meta-analysis of centrally randomized controlled clinical trials. Cancer Immunol Immunother 2006; 55: 404-11.