John Ringman, a neurologist at the University of Southern California, gives a presentation on the Alzheimer's mutation for John and Jay Kitchen's family in Riverside, California, on Sunday, November 22, 2015. Ringman has devoted much of his career to studying families with the mutation.
John Ringman, a neurologist at the University of Southern California, gives a presentation on the alzheimer mutation for John and Jay Kitchen’s family in Riverside, California, on Sunday, November 22, 2015. Ringman has devoted much of his career studying families with the mutation. (Heidi de Marco/KHN)