Please assess the completion status of the following clinical trial:

Trial Title: Effect of SPD422 on Platelet Lowering and Safety in Japanese Adults With At Risk Essential Thrombocythaemia

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

Eligibility Criteria:
Inclusion Criteria:~* Subjects must have previously been treated with a cytoreductive therapy and been intolerant or refractory to that therapy.~Exclusion Criteria:~* Subjects should not have any other underlying conditions or medications that would confound the study analysis or interact with the study medication.

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Anagrelide Hydrochloride (Type: EXPERIMENTAL): None

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