1 Department of Internal Medicine, Sticht Center on Aging, and the Roena Kulynych Center on Cognition Research, Wake Forest University School of Medicine, Winston-Salem, NC 27157.
2 Department of Internal Medicine, Sticht Center on Aging, and the Roena Kulynych Center on Cognition Research, Wake Forest University School of Medicine, Winston-Salem, NC 27157. Electronic address: jwilliam@wakehealth.edu.