1. Department of Radiation Genetics and Chemical Mutagenesi s, MGC, Leiden University Medical Centre, Leiden and JA Cohen Institute of Radiopathology and Radiation Protection Inter-University Institute, Leiden, The Netherlan ds.
2. TNO, Centre for Radiological Protection and Dosimetry, Rijswijk, The Netherlan ds.
3. Biomedical Primate Research Centre, Rijswijk, The Netherlan ds.
4. Department of Clinical Oncology, Leiden University Hospital, Leiden, The Netherlan ds.