Dr. Apostolis Papaefthymiou currently works as a Senior Research Fellow on UGI Medicine and Therapeutic Endoscopy at the Cleveland Clinic London. He is also a Gastroenterology Resident at the University Hospital of Larissa and a PhD Candidate at the Aristotle University of Thessaloniki (AUTH). He obtained his Doctor of Medicine from the Aristoteleion Panepistimion Thessalonikis. He was a Fellow in HPB Medicine and Advanced Endoscopy at University College London Hospitals NHS Foundation Trust for one year.