Dr Charalambos Gnardellis is a Professor of Biostatistics at the Technological Educational Institute of Messolonghi, Greece. Professor Gnardellis holds an MSc (DEA) and a PhD (Doctorat 3eme cycle) in Statistics from the University Pierre et Marie Curie – Paris VI. In the past he has worked as research fellow in the National School of Public Health, Athens, Greece, as senior statistician in the Computer Centre of Social Services and as data analyst in the Greek Ministry of Defence. He has been involved as senior statistician in large epidemiological multicentric studies that have been funded by the World Health Organization (WHO), the European Community and other major funding bodies. Professor Gnardellis has published 6 monographs, 28 original papers in international peer-reviewed journals, 16 original papers in Greek peer reviewed journals and 36 abstracts in national and international conferences. He has also published two books, in 2003 and 2006.