UNITED STATES - SEPTEMBER 26: The Pfizer Inc. headquarters in New York, U.S., on Wednesday, Sept. 26, 2007. Pfizer Inc.'s experimental kidney cancer treatment shrank tumors in a mid-stage clinical trial, giving the world's largest drugmaker a potential back-up for its Sutent cancer medicine. (Photo by Robert Caplin/Bloomberg via Getty Images)
MRI Brain Scan of head and skull with hand pointing
Doctor viewing CT scan result of brain on digital tablet for abnormalities
MRI scan of human brain and skull
Male Alzheimer's patient on bed, reminders on dresser drawers
