1. Department of Gastroenterology; University Hospital Split; Split Croatia
2. Public Health Institute of Split and Dalmatian District; Split Croatia
3. Department of Hematology; General Hospital Sibenik; Sibenik Croatia
4. Clinic of Tumors; University Hospital Sestre Milosrdnice; Zagreb Croatia
5. Department of Pathology; University Hospital Split; Split Croatia
6. Department of Gastroenterology; Clinical Hospital Sveti Duh; Zagreb Croatia
7. Department of Pulmology; Clinical Hospital Sveti Duh; Zagreb Croatia