- Complete staging work-up within 3 months prior to randomization. All patients must have had breast imaging by breast ultrasound plus either bilateral mammography or breast MRI (one of those <= 21 days). All patients must have had chest X-ray (PA and lateral), abdominal ultrasound or CT scan or MRI, and bone scan (according to guidelines). In case of positive bone scan, bone X-ray is mandatory. Other tests may be performed as clinically indicated.