1. Swedish National Testing and Research Institute, Borås, Sweden
2. International Centre for Indoor Environment and Technology, Technical University of Denmark, Lyngby, Denmark
3. Department of Public Health Sciences, Karlstad University, Karlstad, Sweden
4. Environmental and Occupational Health Sciences Institute, University of Medicine and Dentistry of New Jersey/Robert Wood Johnson Medical School and Rutgers University, Piscataway, New Jersey, USA
5. Department of Environmental and Occupational Medicine, Aarhus University, Aarhus, Denmark