1. Heidi J. Larson is director of The Vaccine Confidence Project and a professor of Anthropology, Risk and Decision Science at the London School of Hygiene & Tropical Medicine, London, UK, and a clinical professor of Health Metrics Sciences at the University of Washington, Seattle, WA, USA.
2. David A. Broniatowski is an associate professor of Engineering Management and Systems Engineering and associate director of the Institute for Data, Democracy, and Politics at The George Washington University, Washington, DC, USA.