- Complications of medical conditions
- Metabolic and toxic encephalopathies
- Dehydration
- Hepatic related
- Hypoglycemia
- Reye syndrome
- Primary Neurological disorders
- Primary infections
- Nutritional, including alcohol intoxication
- HIV related
- Degenerative disorders
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- Psychiatric related
- Depression
- Anxiety
- Psychoses
- Bipolar disorder
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