Secondary Aim of Study

Determine whether administration of 2 years of exemestane following 5 years of tamoxifen therapy is more effective than giving 5 years of tamoxifen alone in prolonging overall survival and time to treatment failure.

Determine whether administration of 2 years of exemestane following 5 years of tamoxifen therapy is more effective than giving 5 years of tamoxifen alone in prolonging overall survival and time to treatment failure.