1 Cancer Mechanisms and Biomarkers Group, Radiation Effects Department, Centre for Radiation, Chemical & Environmental Hazards, Public Health England, Didcot, UK. Electronic address: [email protected].
2 Research Unit Radiation Cytogenetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.
3 Unit 'Biological Radiation Effects, Biological Dosimetry', Department of Radiation Protection and Health, Federal Office for Radiation Protection, Oberschleissheim, Germany.