The primary objective is time to disease progression. All patients must be treated with first line chemotherapy, consisting of one of the following regimens: a) ET (epirubicin 90 mg/sqm day 1 plus paclitaxel 200 mg/sqm (3 hour infusion) day 1, or b) AT (doxorubicin 50 mg/sqm day 1 plus paclitaxel 200 mg/sqm (3 hour infusion) day 2, administered on a 3 weekly schedule.