Please assess the completion status of the following clinical trial:

Trial Title: Preoperative Window of Endocrine Therapy Provides Information to Increase Compliance

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

Eligibility Criteria:
Inclusion Criteria:~* Age \> 18 years old~* Diagnosed with hormone receptor positive invasive breast cancer (estrogen receptor (ER) or progesterone receptor (PR) or both \>1%) by core needle biopsy~* Clinical American Joint Committee on Cancer (AJCC) 7th edition Stage 1 or 2~* Candidate for surgical therapy~* Eastern Cooperative Oncology Group (ECOG) performance status 0,1, or 2~* No chemotherapy or endocrine therapy for breast cancer in last 5 years~* Paraffin fixed core needle tissue block, or biopsy punch available for central analysis for proliferative markers~* Not pregnant or lactating and practicing adequate birth control if premenopausal~* Able and willing to provide informed consent~Exclusion Criteria:~* Prior personal history of uterine cancer~* Prior personal history of stroke or deep vein thrombosis (DVT)~* Current therapy with strong CYP2D6 inhibitors The following medications should not be administered with tamoxifen (21 day treatment period) and will need to be stopped for the designated period of time prior to starting the study tamoxifen.~No other prior malignancy is allowed except for the following: adequately treated basal cell or squamous cell skin cancer, in situ cervical cancer, adequately treated Stage 0, I or II cancer from which the patient is currently in complete remission, or any other cancer from which the patient has been disease-free for 5 years~Fluoxetine - should be discontinued 30 days prior to starting tamoxifen Paroxetine - should be discontinued 5 days prior to starting tamoxifen Sertraline - should be discontinued 5 days prior to starting tamoxifen Bupropion - should be discontinued 5 days prior to starting tamoxifen~* Concurrent coumarin-type anticoagulation therapy~* Any other contraindications to tamoxifen therapy

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

Study Arms:
- All patients (Type: EXPERIMENTAL): All patients enrolled in the study.

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