1 Catharina Wesseling and Jennifer Crowe are with the Program on Work, Environment and Health in Central America (SALTRA), Central American Institute for Studies on Toxic Substances (IRET), Universidad Nacional, Heredia, Costa Rica. Christer Hogstedt is with the Institute of Environmental Medicine (IMM), Karolinska Institutet, Stockholm, Sweden. Kristina Jakobsson is with the Department of Occupational and Environmental Medicine, Lund University, Lund, Sweden. Rebekah Lucas is with the Hothaps Program, Umeå International School of Public Health, Umeå University, Umeå, Sweden. David H. Wegman is with Work Environment, University of Massachusetts, Lowell.