Please assess the completion status of the following clinical trial:

Trial Title: Optimal Duration of Pre-operative Treatment With Letrozole and to Correlate Clinical Efficacy With Appropriate Surrogate Markers

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE2/PHASE3
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion criteria:~1. Female Breast Cancer patients with primary invasive breast cancer, histologically confirmed by core needle biopsy, whose tumors are estrogen (ER) and / or progesterone (PgR) positive (Clinical Stage \*T2, T3, T4a,b,c, N0, M0)~2. Patients after menopause~3. Tumor measurable by clinical examination, mammography and ultrasound~4. Adequate bone marrow, renal and hepatic function~5. A life expectancy of at least 6 months.~Exclusion criteria:~1. Prior treatment with aromatase inhibitors or antiestrogens.~2. Uncontrolled endocrine disorders such as diabetes mellitus, confirmed hypo- or hyperthyroidism, Cushing´s Syndrome, Addison´s disease (treated or untreated), Patients with unstable angina, uncontrolled cardiac disease (e.g. Class II or IV New York Heart Association's Functional Classification).~3. Patients with tumors in both breasts, evidence of inflammatory breast cancer or distant metastasis~4. Patients who are eligible for breast conserving surgery.~5. Concomitant anti-cancer treatments such as chemotherapy, immunotherapy/biological response modifiers (BRM's), endocrine therapy (including steroids), bisphosphonate therapy and radiotherapy. Patients who have received HRT will NOT be excluded, provided that HRT is discontinued at least 2 weeks prior to entry into the study.~Other protocol defined inclusion/exclusion criteria may apply

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

Study Arms:
- Letrozole (Type: EXPERIMENTAL): None

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