1 Department of Anatomy, Faculty of Medicine and Dentistry, Palacky University Olomouc, Hnevotinska 3, Olomouc, 77515, Czech Republic.
2 Department of Oncology, Palacky University Medical School and Teaching Hospital, Olomouc, Czech Republic.
3 Department of Anatomy, Faculty of Medicine and Dentistry, Palacky University Olomouc, Hnevotinska 3, Olomouc, 77515, Czech Republic. mlejnek_petr@volny.cz.