Dr. Kasper is an internist with a subspecialty in hematology. She is well-known for her study of the diagnosis and treatment of hemophilia over the past 40 years. She currently tutors hematology Fellows at the Center. Dr. Kasper is an Emerita Professor of Medicine of the University of Southern California. She was the medical director of the World Federation of Hemophilia from 1994 to 2000, and has been on the Board of Directors of the National Hemophilia Foundation since 2004.