1. Institute of Emergency Medicine of Zagreb County, Zagreb, Croatia
2. Referral Center for Pediatric Gastroenterology and Nutrition, Children’s Hospital Zagreb, Zagreb, Croatia
3. School of Medicine, University of Zagreb, Zagreb, Croatia
4. Department of Pediatric Surgery, Children’s Hospital Zagreb, Zagreb, Croatia
5. “Ljudevit Jurak” Department of Pathology, Clinical Hospital Center “Sestre Milosrdnice,” University of Zagreb, Zagreb, Croatia
6. School of Medicine, University J.J. Strossmayer, Osijek, Croatia