Prof. Andrzej Drop, M.D., Ph.D.Rector of the Medical University of Lublin Weronika Topolan (language editor) Prof. Katarzyna Emerich M.D., Ph.D. (referee) Leszek Szalewski M.D., Ph.D (cover image) Piotr Gawda (cover design, DTP) Jolanta Szymańska (cover design) Prof. Anna Surdacka M.D., Ph.D. (referee)