The Chicago-based Alzheimer's Association announced the program Tuesday.
It's working with the National Institute on Aging to create the gene bank with samples from more than one thousand families affected by late-onset Alzheimer's.
Most of the four million Americans with Alzheimer's have that form of the disease, which is typically diagnosed after age 60.
Creighton Phelps of the NIA says it will take about three years to identify patients and collect and analyze samples.
Participants will have a single simple blood test.
Samples will be sent to the Indiana University Medical Center in Indianapolis, where the research will be conducted.
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