Surowiak, Paweł, Department of Histology and Embryology, University School of Medicine, Wrocław, Poland Surowiec, Iwona, The Regional Blood Donors Center of Kielce Sušnik Bajec, Simona, University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Domžale Sutkowski, Krzysztof, 1st Department and Clinic of General, Gastroenterological and Endocrine Surgery, Wroclaw Medical University, Wroclaw, Poland Swiatecka, J Swiatecka, Jolanta Swiatko, Katarzyna, Department of Histology and Embryology, Medical University in Wroclaw, Wroclaw, Poland Świątkowska, Ewa Swiderska-Kolacz, Grazyna, Department of Animals Physiology, The Jan Kochanowski University in Kielce Swierniak, Michal Swietoslawski, Jacek Sygut, Jacek Syryło, Tomasz Sysa-Jedrzejowska, Anna Sysa-Jedrzejowska, Anna, Uniwersytet Medyczny w Łodzi (Poland) Szaflarski, Witold Szajda, Slawomir Szajda, Slawomir Dariusz Szajda, Sławomir Dariusz, Department of Emergency Medicine and Disasters, Medical University of Bialystok Szajda, Sławomir Dariusz, Department of Pharmaceutical Biochemistry, Medical University, Białystok, Poland Szajda, Sławomir Dariusz Szamatowicz, Jacek Szarek, Józef Szarmach, Izabela Szarras-Czapnik, Maria, Clinic of Endocrinology and Diabetology, Children’s Memorial Health Institute, Warsaw