1. Steven Cummins ( ) is a professor of population health and a National Institute of Health Research Senior Fellow in the Department of Social and Environmental Health Research, London School of Hygiene and Tropical Medicine, in the United Kingdom.
2. Ellen Flint is a research fellow in the in the Department of Social and Environmental Health Research, London School of Hygiene and Tropical Medicine.
3. Stephen A. Matthews is an associate professor in the Departments of Sociology, Anthropology, and Demography, Penn State University, in State College, Pennsylvania.