Please assess the completion status of the following clinical trial:

Trial Title: Hydroxyurea in Primary Progressive Multiple Sclerosis

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE2/PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* sign written informed consent~* 18 to 60 years of age inclusive~* diagnosis of PP-MS according to McDonald criteria~* EDSS score at screening of 2-7 inclusive~Exclusion Criteria:~* hypersensitivity to hydroxyurea~* patients who were treated with immunosuppressive drugs or steroid three month before~* respiratory or urinary infections~* history or presence of malignancy~* pregnancy or lactation~* low compliance to the therapy

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 60 Years
- Healthy Volunteers: f

Study Arms:
- Hydroxyurea (Type: EXPERIMENTAL): None
- Placebo (Type: PLACEBO_COMPARATOR): None

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