| NCT Number | NCT01872975 |
| Lead Sponsor | NSABP Foundation Inc
Collaborators: National Cancer Institute (NCI), Radiation Therapy Oncology Group |
| Conditions | Stage IB Breast Cancer, Stage II Breast Cancer |
| Enrollment | 1,636 participants |
| Start Date | 2013-08 |
| Primary Completion | 2023-09-14 (estimated) |
| Study Completion | 2028-08 (estimated) |
| Updated on ClinicalTrials.gov | 2023-12-27 |