(Reissue of RFA-NS-16-021, PAR-18-413, RFA-NS-19-039) Diffuse brain white matter disease is highly prevalent in the elderly, and has been clinically associated with vascular contributions to cognitive impairment and dementia (VCID) in both men and women. Diffuse white matter disease is thought to include a variety of pathologies including demyelination and/or fiber loss due to multifocal infarction and local ischemia. It is often accompanied by arteriosclerosis in deep penetrating arteries, multiple infarcts in th...