1 Jerusalem College of Technology, Jerusalem, Israel.
2 Professor Emeritus, Heinrich Heine University, Düsseldorf, Germany.
3 National Centre for Nuclear Research (NCBJ), Swierk, Poland.
4 Professor Emeritus, former head of the Department of Radiobiology and Radiation Protection, Military Institute of Hygiene and Epidemiology, Warsaw, Poland.
5 Professor, Faculty of Science, McMaster University, Hamilton, Canada.
6 Professor Emeritus, Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland.