1. Department of Surgery, Faculty of Medicine, Ivane Javakhishvili Tbilisi State University, 0179 Tbilisi, Georgia
2. Department of Surgery, University Clinic of Regensburg, D-93053 Regensburg, Germany
3. Aleqsandre Natishvili Institute of Morphology, Ivane Javakhishvili Tbilisi State University, 0159 Tbilisi, Georgia
4. Infectious Diseases, AIDS and Clinical Immunology Research Center, 0160 Tbilisi, Georgia