S0812 High Dose Cholecalciferol in Premenopausal Women at High-Risk for Breast Cancer
Status: COMPLETED
Study type: INTERVENTIONAL
Conditions: brca1 Mutation Carrier|brca2 Mutation Carrier|Breast Cancer
Interventions: DIETARY_SUPPLEMENT: cholecalciferol|OTHER: placebo
Sponsor: SWOG Cancer Research Network
Collaborators: National Cancer Institute (NCI)