1. University of Stavanger, Stavanger, Norway
2. Belgian Nuclear Research Centre and University of Antwerp, Antwerp, Belgium
3. Kings College London, London, UK
4. Institute of Advanced Sustainability Studies, Potsdam, Germany
5. University of Erfurt, Erfurt, Germany
6. School of Psychology, Trinity College Dublin, Dublin, Ireland
7. Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
8. European Radon Association (ERA) and Agency for Health and Food Safety, Vienna, Austria
9. Federal Office for Radiation Protection, Neuherberg, Germany
10. Environmental Protection Agency, Dublin, Ireland
11. National Radiation Protection Institute (SURO), Prague, Czech Republic
12. Federal Office of Public Health, Liebefeld, Switzerland
13. Saxon State Ministry of the Environment and Agriculture, Dresden, Germany
14. Bayerisches Landesamt für Umwelt, Augsburg, Germany