1. Mallinckrodt Institute of RadiologyWashington University in St. Louis St. Louis MissouriUSA
2. Department of Medicine Division of Geriatrics and Nutritional Science Washington University in St. Louis St. Louis MissouriUSA
3. Department of Pathology and Immunology Washington University in St. Louis St. Louis MissouriUSA
4. Department of Neurology Washington University in St. Louis St. Louis MissouriUSA
5. Division of Biostatistics Washington University in St. Louis St. Louis MissouriUSA
6. Department of Neurology Fifth Affiliated Hospital of Zunyi Medical University Zhuhai China
7. College of Medicine and Health University of Exeter Exeter UK