1. UPMC Medical Education Transitional Year Residency Program, University of Pittsburgh School of Medicine, Hillman Cancer Center, Research Pavilion, Pittsburgh, PA 15213, USA.
2. Department of Radiation Oncology, University of Pittsburgh School of Medicine, Hillman Cancer Center, Research Pavilion, Pittsburgh, PA 15213, USA.
3. Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Hillman Cancer Center, Research Pavilion, Pittsburgh, PA 15213, USA.