1. Department of General Surgery, Szent Imre University Teaching Hospital , Budapest , Hungary
2. Department of Internal Medicine and Haematology, Semmelweis University , Budapest , Hungary
3. Department of Obstetrics and Gynecology, Medical University of Vienna , Vienna , Austria
4. Department of Internal Medicine and Oncology, Division of Oncology, Semmelweis University , Budapest , Hungary
5. Department of Biomathematics and Informatics, University of Veterinary Medicine Budapest , Budapest , Hungary
6. Department of Internal Medicine and Haematology, Semmelweis University , Szentkiralyi utca 46. , H-1088 Budapest , Hungary
7. Department of Internal Medicine and Oncology, Division of Oncology, Semmelweis University , Tomo utca 25-29. , H-1083 Budapest , Hungary