LUKASZ KROKOWICZ1*, HANNA TOMCZAK2, ADAM BOBKIEWICZ1, JACEK MACKIEWICZ3, 4, 5, RYSZARD MARCINIAK1, MICHAL DREWS1 and TOMASZ BANASIEWICZ 1 Department of General Surgery, Oncologic Gastroenterologic Surgery and Plastic Surgery, Poznan University of Medical Sciences, Poznań, Poland 2 Central Laboratory of Microbiology, H. Swiecicki Hospital of Poznan University of Medical Scie...