Sirenko, Yuriy, Institute of Cardiology, Kiev, Ukraine Sirenko, Yuriy Sirnes, Per Anton Sitar, Jan Sitbon, Olivier Sitkiewicz, Dariusz, Department of Laboratory Medicine, Biochemistry and Clinical Chemistry, Medical University of Warsaw, Poland Sitkiewicz, Dariusz, Medical University of Warsaw Sitkiewicz, Dariusz Sitkiewicz, Dariusz Sitko, Tadeusz Sitko, Tomasz Sitkowska, Ewa Sitkowska-Rysiak, Ewa Sitkowska-Rysiak, Ewa Sitkowska-Rysiak, Ewa Sitkowski, Dariusz Sitnik, Magdalena Siuda, Katarzyna Siuda, Marcin Siudak, Zbigniew, Institute of Cardiology Jagiellonian University Medical College in Krakow Siudak, Zbigniew Siudak, Zbigniew, Department of Interventional Cardiology, University Hospital, Krakow (Poland) Siudak, Zbigniew, Instytut Kardiologii w Krakowie Siudak, Zbigniew, Department of Interventional Cardiology, University Hospital in Krakow Siudak, Zbigniew, Department of Interventional Cardiology, Institute of Cardiology, Krakow, Poland