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Dr. Doug Scharre, left, and Dr. Punit Agrawal, center, prepare Kathleen Sanford's deep brain stimulation device for monitoring Monday, Dec. 17, 2012, in Columbus, Ohio. Sanford is an Alzheimer's patient that has a deep brain stimulation implant as part of a study at Ohio State University. In small experiments, scientists are implanting pacemaker-like devices deep in the brains of some people with early-stage Alzheimer's in hopes of slowing the disease's damage. The tiny wires send mild jolts of electricity to stimulate the brain. (AP Photo/Jay LaPrete)

Associated Press
Dr. Doug Scharre, left, and Dr. Punit Agrawal, center, prepare Kathleen Sanford's deep brain stimulation device for monitoring Monday, Dec. 17, 2012, in Columbus, Ohio. Sanford is an Alzheimer's patient that has a deep brain stimulation implant as part of a study at Ohio State University. In small experiments, scientists are implanting pacemaker-like devices deep in the brains of some people with early-stage Alzheimer's in hopes of slowing the disease's damage. The tiny wires send mild jolts of electricity to stimulate the brain. (AP Photo/Jay LaPrete)
Dr. Doug Scharre, left, and Dr. Punit Agrawal, center, prepare Kathleen Sanford's deep brain stimulation device for monitoring Monday, Dec. 17, 2012, in Columbus, Ohio. Sanford is an Alzheimer's patient that has a deep brain stimulation implant as part of a study at Ohio State University. In small experiments, scientists are implanting pacemaker-like devices deep in the brains of some people with early-stage Alzheimer's in hopes of slowing the disease's damage. The tiny wires send mild jolts of electricity to stimulate the brain. (AP Photo/Jay LaPrete)
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