Please assess the completion status of the following clinical trial:

Trial Title: Correlation Between Regional Brain Volume and Response to Donepezil Treatment in AD Patients

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE4
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion criteria:~1. Over 60 years old.~2. Probable or possible Alzheimer's Disease according to the DSM-IV and NINCDS-ADRDA.~3. MMSE score of 10\~24, CDR of 1\~2.~4. Patients didn't take acetylcholinesterase inhibitors 4 weeks before screening.~5. Permitted drugs: antipsychiatric drug for BPSD, antidepression drug, tranquilizer, treatment drug for physical disease for example hypertension.~Exclusion criteria:~1. Uncontrolled by donepezil because of adverse events.~2. No longer continuing treatment of donepezil for refuse, drug-drug interaction etc.~3. If they have taken concomitant medication which were not allowed.

- Gender: ALL
- Minimum Age: 60 Years
- Maximum Age: None
- Healthy Volunteers: f

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

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