Please assess the completion status of the following clinical trial:

Trial Title: Hydroxyurea and Magnesium Pidolate to Treat People With Hemoglobin Sickle Cell Disease

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE2
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Diagnosis of HbSC disease~* Hemoglobin level between 8 and 12.5 g/dL~* At least one vaso-occlusive event (e.g., pain, acute chest syndrome) in the 12 months prior to study entry. An episode of pain is defined as the occurrence of pain in the extremities, back, abdomen, chest, or head that lasts at least 2 hours; requires a visit to a hospital, emergency room, clinic, or provider's office; and is not explained except by SCD. Acute chest syndrome is defined as a new pulmonary infiltrate on a chest x-ray associated with a fever (greater than 38.5° C), tachypnea, wheezing, cough, or chest pain.~* Regular compliance with comprehensive care~* In a steady disease state and not experiencing an acute complication of SCD (i.e., no hospitalization, pain event, or episode of acute chest syndrome within the 1 month prior to study entry)~Exclusion Criteria:~* Previous transfusion with remaining hemoglobin A greater than 10%~* Previous treatment with hydroxyurea within the last 3 months~* Previous treatment with magnesium within the 3 months prior to study entry (including vitamins containing magnesium)~* Poor compliance with previous treatment regimens~* Liver dysfunction (SGPT greater than twice the upper limit of normal) within the 1 month prior to study entry~* Kidney dysfunction (creatinine greater than or equal to 1.0 mg/dL for participants less than 18 years of age; greater than or equal to 1.2 mg/dL for participants 18 years of age or older) within the 1 month prior to study entry~* Pregnant~* Ten or more hospital admissions for pain in the 12 months prior to study entry~* Daily use of narcotics~* Treatment with any investigational drug in the 3 months prior to study entry~* Less than 3% red blood cells with density greater than 41 g/dL (as measured by the ADVIA 120 system)~* Positive HIV test~* Other long-term illness or disorder other than SCD that could adversely affect performance in the study (e.g., tuberculosis)

- Gender: ALL
- Minimum Age: 5 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Placebo Pills and Placebo Liquid (Type: PLACEBO_COMPARATOR): None
- Hydroxyurea Pills and Placebo Liquid (Type: ACTIVE_COMPARATOR): None
- Placebo Pills and Magnesium Pidolate Liquid (Type: ACTIVE_COMPARATOR): None
- Hydroxyurea Pills and Magnesium Pidolate Liquid (Type: ACTIVE_COMPARATOR): None

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