Shou-Mei Li, left, wraps a scarf around her husband Hsien-Wen Li, who is an Alzheimer's patient, as their daughter Shirley Rexrode, right, looks on, at their home in San Francisco, in this photo taken Thursday, Sept. 1, 2011. Dementia is poised to become a defining disease of a rapidly aging population _ and a budget-busting one for Medicare, Medicaid and families. The Obama administration is developing the first national Alzheimer's plan to combine research aimed at fighting dementia with help for caregivers. Around the country, thousands of families are pleading for changes to improve early diagnosis and help keep loved ones at home instead of in nursing homes. (AP Photo/Ben Margot)

Associated Press
Shou-Mei Li, left, wraps a scarf around her husband Hsien-Wen Li, who is an Alzheimer's patient, as their daughter Shirley Rexrode, right, looks on, at their home in San Francisco, in this photo taken Thursday, Sept. 1, 2011.  Dementia is poised to become a defining disease of a rapidly aging population _ and a budget-busting one for Medicare, Medicaid and families. The Obama administration is developing the first national Alzheimer's plan to combine research aimed at fighting dementia with help for caregivers. Around the country, thousands of families are pleading for changes to improve early diagnosis and help keep loved ones at home instead of in nursing homes.  (AP Photo/Ben Margot)
Shou-Mei Li, left, wraps a scarf around her husband Hsien-Wen Li, who is an Alzheimer's patient, as their daughter Shirley Rexrode, right, looks on, at their home in San Francisco, in this photo taken Thursday, Sept. 1, 2011. Dementia is poised to become a defining disease of a rapidly aging population _ and a budget-busting one for Medicare, Medicaid and families. The Obama administration is developing the first national Alzheimer's plan to combine research aimed at fighting dementia with help for caregivers. Around the country, thousands of families are pleading for changes to improve early diagnosis and help keep loved ones at home instead of in nursing homes. (AP Photo/Ben Margot)
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