1. Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
2. Department of Environmental and Occupational Health, School of Public Health, University of Medicine and Denistry of New Jersey, Piscataway, New Jersey, USA
3. Department of Environmental and Occupational Medicine, University of Aarhus, Aarhus, Denmark
4. Department of Environmental Health, National Public Health Institute of Finland, Kuopio, Finland
5. Department of Environmental and Community Medicine, Robert Wood Johnson Medical School, University of Medicine and Denistry of New Jersey, Piscataway, New Jersey, USA
6. Department of Services and Applied Research, Centraalbureau voor Schimmelcultures, Utrecht, the Netherlands
7. Department of Environmental and Occupational Health, School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA