1. Leibniz Universität Hannover, Institute of Radioecology and Radiation Protection, 30419 Hannover, Germany
2. Fukushima University, Faculty of Symbiotic Systems Science, Fukushima 960-1296, Japan
3. State Specialized Enterprise “Ecocentre” (SSE “Ecocentre”), Chernobyl 07270, Ukraine
4. University of Vienna, Faculty of Life Sciences, Cell Imaging and Ultrastructure Research, 1090 Vienna, Austria
5. University of Vienna, Faculty of Chemistry, Institute of Inorganic Chemistry, 1090 Vienna, Austria
6. State Specialized Enterprise “Radon Association”, Kyiv 03083, Ukraine