Considered one of the country’s leading experts on neurological disease research, Dr. Marwan Sabbagh is the founding director of The Cleo Roberts Center for Clinical Research at the Sun Health Research Institute in Sun City, Arizona. The board-certified neurologist has served as principle investigator on more than 30 clinical trials related to Alzheimer's and Parkinson's diseases and has conducted research on prostate cancer and arthritis. Dr. Sabbagh received his bachelor’s degree from University of California at Berkeley before earning his medical degree from the University of Arizona. After completing his residency in neurology at Baylor College of Medicine, Dr. Sabbagh participated in the fellowship program studying geriatric neurology and dementia at the University of California-San Diego School of Medicine. In addition to his ongoing clinical research, Dr. Sabbagh is the staff neurologist at the Phoenix Indian Medical Center (PIMC) and serves the medical field working in a number of educational capacities.