C J Standley1, E M Sorrell1, S Kornblet1, A Vaught1, J E Fischer1, R Katz2. 1. Department of Health Policy and Management, Milken Institute School of Public Health, George Washington University, Washington, DC 20052, USA. 2. Department of Health Policy and Management, Milken Institute School of Public Health, George Washington University, Washington, DC 20052, USA. rlkatz@gwu.edu.