Are persons with an ABI not included? Per the Brain Injury Association of America - 

"Non-Traumatic Brain Injury: Often referred to as an acquired brain injury, a non-traumatic brain injury causes damage to the brain by internal factors, such as lack of oxygen, exposure to toxins, pressure from a tumor, stroke, near-drowning, aneurysm, tumor, infectious disease that affects the brain (i.e. meningitis), lack of oxygen supply to the brain (i.e. heart attack).