Gemcitabine plus Paclitaxel (GT) versus paclitaxel (T) as first-line treatment for anthracycline pre-treated metastatic breast cancer: Interim analysis of a global phase III study (abstr 25). - O'Shaughnessy,J.; Nag,S.; Calderillo-Ruiz,null. (Proc Am Soc Clin Oncol, 2003)