Dr. Katharine Hsu Named Director of Tri-Institutional M.D.-Ph.D. Program April 9, 2021 Dr. Katharine Hsu, an esteemed physician-scientist who specializes in immunology research and treatment of blood cancers, has been named director of the Tri-Institutional M.D.-Ph.D. Program, a joint program between Weill Cornell Medicine, The Rockefeller University and Memorial Sloan Kettering Cancer Center.