Please assess the completion status of the following clinical trial:

Trial Title: Association of Hepatitis C Virus With Breast Cancer

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

Eligibility Criteria:
Inclusion Criteria:~* Biopsy-proven invasive breast cancer.~Exclusion Criteria:~* Patients with unknown viral marker status.~* Patients who did not complete their management at OCMU.~* Patients with multiple cancer diagnoses.~* Patients with virus-unrelated hepatic pathology.

- Gender: FEMALE
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- Study group (Type: None): The data of breast cancer patients treated at OCMU in the last 10 years will be retrieved from the hospital data filing system. All consecutive patients with biopsy-proven invasive breast cancer will be included.
- Control group (Type: None): A group of age-matched women from the same geographical distribution who are healthy volunteers or hospital patients without cancer diagnosis will serve as a control group for the HCV prevalence. We aim at a sample size with a study-to-control ratio of 1:3.

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