Preface
                                    Preface
                                    
                                    
                                                                                                                                    1Department of Cardiology, Faculty of Medicine, Ufuk University; Ankara-Turkey
                                                                                                                        
                                     Anatol J Cardiol   2021; 25():  2-2       DOI: 10.5152/AnatolJCardiol.2021.S102