1. Department of Gastroenterology and Hepatology, Sestre milosrdnice University Hospital Center, Zagreb, Croatia
2. Department of Internal Medicine, Intensive Care Unit, Sestre milosrdnice University Hospital Center, Zagreb, Croatia
3. Department of Gastroenterology, General Hospital Virovitica, Virovitica, Croatia
4. Department of Surgery, Sestre milosrdnice University Hospital Center, Zagreb, Croatia
5. Department of Clinical Chemistry, Sestre milosrdnice University Hospital Center, Zagreb, Croatia
6. Department of Laboratory Diagnostics, University Hospital Center Zagreb, Zagreb, Croatia