1. Department of Laboratory Diagnostics, University Hospital Centre Zagreb, Zagreb, Croatia.
2. Department of Internal Medicine, University Hospital Centre Zagreb, Zagreb, Croatia.
3. Department of Neurology, University Hospital Centre Zagreb, Zagreb, Croatia.
4. Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria.
5. Department of Public Health and Clinical and Molecular Medicine, University of Cagliari, Cagliari, Italy.
6. Department of Internal Medicine, General Hospital Pula, Pula, Croatia.
7. Department of Pediatrics, University Hospital Centre Zagreb, Zagreb, Croatia.
8. Ospedale Regionale Microcitemie, ASL 8, Cagliari, Italy.