Please assess the completion status of the following clinical trial:

Trial Title: Impact of Breast Magnetic Resonance Imaging (MRI) on Mastectomy Rates

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: COHORT
- Primary Purpose: None
- Time Perspective: RETROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* early stage breast cancer between 2006-2009~* preoperative MRI~Exclusion Criteria:~-

- Gender: FEMALE
- Minimum Age: 18 Years
- Maximum Age: 85 Years
- Healthy Volunteers: f

Based on this trial design, predict the completion outcome and termination type (if applicable).