1 Health Effects Institute, Boston, Massachusetts.
2 Department of Public Health, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
3 Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands.
4 Environmental Research Group, School of Public Health, Imperial College, London, United Kingdom.
5 Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden.
6 Department of Occupational and Environmental Medicine, Faculty of Medicine, Lund University, Lund, Sweden.
7 ISGlobal, Barcelona, Spain.
8 Institute for Occupational, Social and Environmental Medicine, Centre for Health and Society, Medical Faculty, University of Düsseldorf, Düsseldorf, Germany.