title: A Tribute and Salute to an Outstanding Colleague.
authors.affiliation: *Department of Radiation Oncology, University of Pennsylvania Medical Center, Philadelphia, PA daggerRobert Wood Johnson Medical School, New Brunswick, NJ.
authors.forename: Giulio J
authors.initials: GJ
authors.lastname: Dʼangio
authors.forename: Barton A
authors.initials: BA
authors.lastname: Kamen