 He acted as president of the Medical Society of Southern Greece for seven years.He was president of the International Society for the History of Medicine from 2004 to 2008, the UNESCO Committee for the History of Medicine, the Greek Society for the History and Archaeology of Medicine and a member of the administrative councils of the International Association of the History of Nephrology, the Commission for the History of Nephrology and the International Society for the History of Nephrology.He is the author of 16 books and more than 400 articles in Greek and international journals, including "Nature", "The Lancet" and "Kidney International".