Joshua T. Mendell and Victor A. McKusick are both experts in what field of medicine?
Joshua T. Mendell: Joshua T. Mendell, M.D., Ph.D., is an associate professor of pediatrics and molecular biology and genetics at the Johns Hopkins School of Medicine, where he is a faculty member of the McKusick-Nathans Institute of Genetic Medicine. Joshua T. Mendell:  Mendell is a Howard Hughes Medical Institute early career scientist and a preceptor for two Johns Hopkins graduate programs. Victor A. McKusick:  He is widely known as the "father of medical genetics".
genetics