Gruenpeter, Paweł Grygiel, Katarzyna, Department of General, Vascular and Transplant Surgery, Medical University of Warsaw, Poland Grzela, Joanna Grzela, Tomasz Grzelazka, Pawel, Student Scientific Group, Chair and Clinic of Vascular and Internal Diseases, Faculty of Health Sciences, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Poland Grześkiewicz, Magda Grzywacz, Alina Gubicskóné Kisbenedek, Andrea Gunawansa, Nalaka Gunawardena, Thilina 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