Hormone Therapy With or Without Combination Chemotherapy in Treating Women Who Have Undergone Surgery for Node-Negative Breast Cancer (The TAILORx Trial)

Combination Chemotherapy Plus Bevacizumab With or Without Oxaliplatin in Treating Older Patients With Metastatic Colorectal Cancer

Early Surgery or Standard Palliative Therapy in Treating Patients With Stage IV Breast Cancer

Paclitaxel, Paclitaxel Albumin-Stabilized Nanoparticle Formulation, or Ixabepilone With or Without Bevacizumab in Treating Patients With Stage IIIC or Stage IV Breast Cancer

Radiation Therapy in Treating Women Who Have Undergone Surgery For Ductal Carcinoma In Situ or Stage I or Stage II Breast Cancer

Letrozole in Treating Postmenopausal Women Who Have Received Hormone Therapy for Hormone Receptor-Positive Breast Cancer