Inter-institutional-Interdepartmental Postgraduate Studies Program of the School of Medicine, the Department of Biology and the Department of Physics of the National and Kapodistrian University of Athens, the Department of Medicine of the Aristotle University of Thessaloniki, the Department of Medicine of the University of Thrace, the Department of Medicine of the University of Ioannina, the Department of Medicine of the University of Crete, in collaboration with the Hellenic Atomic Energy Commission (EEAE) and the N.K.E.F.E. “Demokritos”.