A Study, Comparing a Dose-Titration Regimen of Fulvestrant With the Approved Dosing Regimen in Postmenopausal Patients With Hormone-Responsive Advanced Breast Cancer (ABC)

Fulvestrant 500 mg days 0, 14, 28, then 250 mg every 2 weeks for 5 administrations, then 250 mg every 28 days, until progression or unacceptable toxicity vs Fulvestrant 250 mg every 28 days until progression or unacceptable toxicity