Prof. Dr. Gregory Y. H. Lip is the Price-Evans Chair of Cardiovascular Medicine at the University of Liverpool, UK, and the Director of the Liverpool Centre for Cardiovascular Science at the University of Liverpool and Liverpool Heart & Chest Hospital. He is also a Distinguished Professor at Aalborg University, Denmark, and an Adjunct Professor at Seoul National University and Yonsei University, Seoul, Korea. Professor Lip has had a major interest in the epidemiology of atrial fibrillation (AF), as well as the pathophysiology of thromboembolism in this arrhythmia. Furthermore, he has been researching stroke and bleeding risk factors and improvements in clinical risk stratification. Professor Lip has been on the writing committee for various international guidelines, including chairing the American College of Chest Physicians (ACCP) Antithrombotic Therapy Guidelines for Atrial Fibrillation, as well as multiple guidelines and/or position statements from the European Society of Cardiology (ESC), European Heart Rhythm Association (EHRA), Asia-Pacific Heart Rhythm Society (APHRS), etc. Professor Lip has acted as senior/section editor for major international textbooks and at senior editorial level for major international journals, including Thrombosis & Haemostasis (Editor-in-Chief, Clinical Studies); Europace (Associate Editor); and Circulation (Guest Editor).