Founded Carolina Neurological Clinic and made contributions to research in Alzheimer's, died at age 87. After training at the University of Virginia and Vanderbilt University, he graduated from the Neurological Institute of New York. He served in the U.S. Army as chief of outpatient neurology at Walter Reed Army Hospital. Dr. Allen conducted one of the original drug trials for Aricept and contributed to research at Duke University that identified the APOE gene as a risk for early-onset Alzheimer's. He was a board member of the American Academy of Neurology, the Alzheimer's Association, and the Southern Clinical Neurological Society, and a deacon at Myers Park Baptist Church. List of survivors.