John W. Cherrie is Emeritus Professor of Human Health, Heriot Watt University, Edinburgh, UK. He is also a Principal Scientist at the Institute of Occupational Medicine, one of the longest-established independent occupational and environmental health research institutes in the world. Sean E. Semple is Associate Professor, Faculty of Health Sciences and Sport, University of Stirling, UK. His research in human exposure science focuses on the health effects of indoor air pollution, occupational epidemiology, air quality measurement, and workplace inhalation hazards. Marie A. Coggins is a Lecturer at the School of Physics and a member of the Centre for One Health at the Ryan Institute, National University of Ireland, Galway, Ireland. She is Academic Director for the NUI, Galway professional accredited BSc Environmental Health and Safety programme. The Exposure Science research group that she leads focuses on human exposure to occupational and environmental pollutants, including indoor air quality in energy efficient buildings.