1. Luisa N. Borrell is a distinguished professor of epidemiology & biostatistics at the Graduate School of Public Health & Health Policy, The City University of New York, New York, NY, and an associate editor of AJPH. Anahí Viladrich is with the Department of Sociology, Queens College, and the Graduate Center & the Graduate School of Public Health & Health Policy, The City University of New York. Luisa N. Borrell is also a guest editor for this supplemental issue.