OUTLINE: This is a randomized, multicenter study. Patients are stratified according to age, treatment center, disease free interval (no more than 18 months vs more than 18 months), hormone receptor status (positive or unknown vs negative), prior adjuvant therapy with anthracyclines (yes vs no), presence of liver metastases (liver involvement as a single organ vs liver plus other organ involvement vs no liver involvement), and presence of lung metastases (yes vs no). Patients are randomized to 1 of 2 treatment arms.