Olsen Rodríguez, Renée Olshansky, Brian Olshansky, Brian, Guest Editor Olszak-Waśkiewicz, Marlena, Department of Cardiology, Military Institute of Health Service, Warsaw, Poland Olszanowski, Andrzej, SS ZOZ nad Matką i Dzieckiem w Opolu Olszewski, Rafał Olszewski, Robert Olszowka, Maciej, Uppsala University Olszowska, Maria, Department of Cardiac and Vascular Diseases, Institute of Cardiology, Jagiellonian University, Cracow, Poland Olszowska, Maria Olszowska, Maria, Jagiellonian University Medical College Institute of Cardiology Departament of Cardiac and Vascular Diseases Olszowski, Dawid, 3rd Department of Cardiology, Silesian Centre for Heart Diseases, Medical University of Silesia, Zabrze, Poland Olsztyn, Michał Omar, Hesham R., Mercy medical Center Omaygenc, Mehmet Onur, Kartal Kosuyolu Heart Education and Research Hospital, Istanbul Omedè, Pierluigi, Departement of Cardiology, Division of Internal Medicine, Città Della Salute e della Scienza Omeroglu, Rukiye Eker Omichi, Chikaya, Cardiovascular Center, Division of Cardiology, Kitahara Hospital, Tokyo, Japan Omote, Kazunori Omotoso, Abo Omyła, Maciej On, Chol-Jun Oncul, Aytac, Professor. Department of Cardiology, Istanbul School of Medicine, Istanbul University, Istanbul, Turkey Oner, Ender, Department of Cardiology, Istanbul Mehmet Akif Er soy Thoracic and Car diovascular Surgery Training and Research Hospital, Istanbul, Turkey Oner, Ender, Department of Cardiology, Stanbul Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey