Gunaydin, Serdar, Ankara Numune Hospital, Department of Cardiovascular Surgery Gursul, Erdal, Biga State Hospital, Department of Cardiology, Canakkale, Turkey Gustavsson, Per Gutmajster, Ewa Gutowski, Piotr Guzicka-Kazimierczak, Renata Guzowski, Andrzej Gładysz, Artur Głowiński, Jerzy Głowiński, Jerzy (Poland) Głowiński, Stanisław Głyda, Maciej Hachuła, Marcin Hafez, Ahmed Mohsen Hajduk, Bogdan Hajsadeghi, Shokoufeh Halena, Grzegorz Halena, Grzegorz, Department of Cardiac and Vascular Surgery, Medical University in Gdańsk, Poland (Poland) Halena, Grzegorz Halena, Grzegorz Wojciech Hamano, Tadanori Hamdioglu, Yalcin Hamera, Agnieszka, Student Scientific Group, Chair and Clinic of Vascular and Internal Diseases, Faculty of Health Sciences, Ludwik Rydygier Hammer, Piotr, Hammermed, Cook Medical Consultant, Warsaw, Poland Hammer, Piotr (Poland)