Efficacy of oral tegafur-uracil (UFT) as adjuvant therapy as compared with classical cyclophosphamide, methotrexate, and 5-fluorouracil (CMF) in early breast cancer: a pooled analysis of two randomized controlled trials (N.SAS-BC01 trial and CUBC trial) - Ohashi, Y; Watanabe, T; Sano, M (Breast Cancer Res Treat, 2010)