[1] Inst Radioprotect & Surete Nucl IRSN PRP HOM SDE, Lab Dosimetrie Rayonnements Ionisants, F-92262 Fontenay Aux Roses, France
[2] Belgian Nucl Res Ctr, Dept Radiat Protect Dosimetry & Calibrat, BE-2400 Mol, Belgium
[3] Radiat & Nucl Safety Author, Res & Environm Surveillance Dept, Helsinki 00881, Finland
[4] Greek Atom Energy Commiss, Div Licensing & Inspect, Athens 15310, Greece
[5] Fed Off Radiat Protect, Radiat Epidemiol Unit, D-85764 Oberschleissheim, Germany