A Conversation between Past and Present Chairs of the American Board of Physical Medicine and Rehabilitation: Four Decades of History and the Future of Board Certification

John F. Ditunno, B. Stanley Cohen, John L. Melvin, Joel A. Delisa, Nicolas E. Walsh, Margaret A. Turk, Dennis J. Matthews, Teresa L. Massagli, Karen J. Kowalske, Anthony E. Chiodo, James T. McDeavitt