1. Clinic for Pediatric Medicine Helena, Ulica kneza Branimira 71, 10000 Zagreb, Croatia
2. Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, Josipa Huttlera 4, 31000 Osijek, Croatia
3. Prima Nova, Zagrebačka cesta 132a, 10000 Zagreb, Croatia
4. Children’s Hospital Srebrnjak, Srebrnjak 100, 10000 Zagreb, Croatia
5. Faculty of Medicine, Catholic University of Croatia, Ilica 242, 10000 Zagreb, Croatia