Efstratios Koletsis is an Associate Professor of Thoracic Surgery at the Department of Cardiothoracic Surgery, School of Medicine, University of Patras, Greece. He received his Medical Diploma from the School of Medicine, University of Patras in 1994, his Ph.D. at Patras in 2003 (with honors), and his M.Sc. degree from the University of Athens Greece and University of Milan in 2013. He was a thoracic surgeon at the Medical Center of Athens, Greece from 2003 to 2005, and has been a thoracic surgeon at Patras University Hospital since 2005. He was an Honorary Professor of Thoracic Surgery at University College London Hospitals NHS Foundation Trust from 1 December 2016 to 30 May 2017. He was Chief of Cardiothoracic Surgery Department, University of Patras from 09/2018 to 08/2020.  He is a member of the European Association for Cardiothoracic Surgery.