Dr. Polychronis D. Stivaktakis has graduated from the Department of Natural Resources and Environmental Management of the University of Ioannina, where he also obtained his Ph.D. entitled “Study of the biological action of certain pesticides in correlation with their physicochemical properties”. He is a senior researcher in the Laboratory of Toxicology of the Medical School of the University of Crete. His scientific research is focused on determination of xenobiotics in biological samples and their genotoxic effects on organisms. Dr Stivaktakis has over 60 publications in peer-reviewed international journals and international congresses.