BSc, MD, MSc, BTS Χειρουργός Θώρακος, Ιατρικό Διαβαλκανικό Κέντρο, Θεσσαλονίκη, Regent of ESTS Σύμβουλος Ελληνικής Εταιρείας Χειρουργών Θώρακος, Καρδιάς και Μεγάλων Αγγείων
Athanasios D.Kleontas was born in Thessaloniki, Greece in 1975. He received certification from Medium Technical Professional Nursing Faculty, of General Hospital "Papanikolaou”, Thessaloniki, in 1995. He received a Bachelor's Degree (BSc) from Department of Medical Laboratories Faculty, of Sciences of Health and Providence Technological Educational Institution Thessaloniki, in 1998. He received his Doctor of Medicine (MD) from the Medical School, Aristotle University of Thessaloniki, in 2006. Then, he followed a Master of Science (MSc) course in Endovascular techniques, by a transnational postgraduate program, in collaboration between University of Athens and University of Milan - Bicocca, in 2012. He is officially a Doctor of Philosophy (PhD) candidate from 2012, in the field of Thoracic Surgery at Medical School, Aristotle University of Thessaloniki. He received his National Board of Cardiothoracic Surgery (BTS) in 2016. He has been specialized in Video Assisted Thoracic Surgery (VATS) and Endoscopic Tracheobronchial Surgery, as Clinical Fellow in the Thoracic Department at St. James' Institute of Oncology, University Hospital of Leeds Teaching Hospital Trust, NHS, UK for 3 months, in 2015.
He is active participated in 128 national and international congresses and published 225 papers in medical journals and congresses (38 in MedLine).