Dr. Chang is an Assistant Professor of Oncology and member of the Cancer Control Program at Georgetown Lombardi Comprehensive Cancer Center. Prior to joining the faculty at Lombardi in 2010, he completed a post-doctoral fellowship program in Health Services and Outcomes Research at the Institute for Healthcare Studies, Feinberg School of Medicine Northwestern University. He received a Doctor of Public Health degree and a Master of Science in Health Informatics degree from the University of Texas Health Science Center at Houston, School of Public Health and School of Biomedical Informatics, respectively. Dr. Chang's primary research interests are related to the use of decision analytical techniques and mathematical models for the economic evaluation of health interventions. His recent research topics include impact of obesity on breast cancer incidence and mortality, cost-effectiveness analysis for screening and treatment of liver cancer, and evaluation of the impact of the newly proposed United Network for Organ Sharing simultaneous liver kidney transplantation policy on post-transplant survival. He is also interested in the costs and cost effectiveness of genetic counseling and testing for hereditary cancer risk.