Please assess the completion status of the following clinical trial:

Trial Title: Long-term Safety of SPD422 in Japanese Adults With 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 completed Study SPD422 308

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

Study Arms:
- SPD422 (anagrelide hydrochloride) (Type: EXPERIMENTAL): None

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