Prof. Qianli Xue is Associate Professor of Medicine at Johns Hopkins University Department of Medicine Division of Geriatric Medicine and Gerontology. Prof. Xue is serving as Division Director of Biostatistics. He holds joint appointments at Departments of Biostatistics and Epidemiology at the Johns Hopkins Bloomberg School of Public Health. Prof. Xue is a founding member of the Johns Hopkins Center on Aging and Health. Since 2017, he has been appointed as Visiting Professor by the National Clinical Research Center for Geriatrics at Sichuan University West China Hospital,China. Prof. Xue completed his doctoral training in Biostatistics at the Johns Hopkins Bloomberg School of Public Health in 2001. Prof. Xue’s primary area of research is the course and cause of physical frailty – a new medical syndrome that overlaps but is distinct from multimorbidity and disability. His recent work focuses on the relationship between physical frailty and cognitive decline. Prof. Xue has been the Principal or Co-Investigator of multiple research projects on aging funded by the National Institutes of Health in the United States. He has published over 130 peer-reviewed research articles and review chapters on topics including aging-related physical and cognitive decline and its multisystem biology.