Please assess the completion status of the following clinical trial:

Trial Title: Learning Impairments Among Survivors of Childhood Cancer

Study Design Characteristics:
- Allocation: None
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: SUPPORTIVE_CARE
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE4
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* Age: 6 to 18 years old.~* Active subject at St. Jude Children's Research Hospital, or is an age-matched sibling control subject.~* If a subject, received treatment for brain tumor or ALL with either radiation therapy and/or chemotherapy directed at the brain.~* If a subject, at least 12 months post-completion of antineoplastic therapies~* If a subject, no evidence of malignancy, or continuously stable disease since completion of therapy~* English as a primary language~* Informed consent~Exclusion Criteria:~* Glaucoma~* Patient or immediate family member with a history of Tourette's syndrome~* Current antidepressant, anxiolytic, antipsychotic or stimulant therapy~* History of substance abuse~* Recent history of uncontrolled seizures~* Uncorrected hypothyroidism~* Previously or currently randomized on COGRM1 intervention arm~* Previously diagnosed with ADHD, or, if a patient, diagnosed with ADHD prior to diagnosis of malignancy

- Gender: ALL
- Minimum Age: 6 Years
- Maximum Age: 18 Years
- Healthy Volunteers: t

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

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