Eugenia Eng, DrPH, MPH, is professor, department of health behavior at the Gillings School of Global Public Health, University of North Carolina at Chapel Hill.

Amy J. Schulz, PhD, MPH, is professor, department of health behavior and health education, at the School of Public Health, University of Michigan.

Edith Parker, DrPH, MPH, is professor and chair, department of community and behavioral health at the College of Public Health, University of Iowa.