1. Brian K. Bruen ( ) is a lead research scientist in health policy at the George Washington University, in Washington, D.C.
2. Leighton Ku is a professor of health policy at the George Washington University.
3. Xiaoxiao Lu is a doctoral candidate in epidemiology and biostatistics at the University of Maryland, in College Park.
4. Peter Shin is an associate professor of health policy at the George Washington University.