- Suffers from other medical illnesses, including diseases that cause significant cognitive impairment (e.g., severe Alzheimer's), diseases that cause severe psychotic symptoms leading to disorientation (e.g., hepatic encephalopathy), diseases that cause brittle and uncontrollable blood pressure (e.g., pheochromocytoma), and diseases that cause uncontrollable hypercholesterolemia (e.g., severe familial hypercholesterolemia)