1. School of Medicine, University of Zagreb, School of Public Health “A. Štampar”, Croatian Institute of Public Health, Rockefellerova 4, 10000 Zagreb, Croatia
2. School of Medicine, University of Zagreb, Clinical Hospital Center Zagreb, Department of Pediatrics, Kišpatićeva 12, 10000 Zagreb, Croatia
3. School of Medicine, University of Zagreb, Clinical Hospital Center Zagreb, Department of Obstetrics and Gynecology, Petrova 13, 10000 Zagreb, Croatia
4. General Hospital Zabok, Trg Dragutina Domjanića 6, 49210 Zabok, Croatia