1. Department of Pediatrics; School of Medicine; University of Zagreb; University Hospital Centre Zagreb; Zagreb Croatia
2. Division of Neonatology; Department of Obstetrics and Gynecology; University Hospital Merkur; Zagreb Croatia
3. School of Public Health “A. Štampar” and Croatian Institute of Public Health; School of Medicine; University of Zagreb; Zagreb Croatia
4. Department of Obstetrics and Gynecology; University Hospital Sveti Duh; School of Medicine; University of Zagreb; Zagreb Croatia
5. Division of Biomedical Statistics and Informatics; Mayo Clinic; Rochester Minnesota USA
6. Department of Anesthesiology; Mayo Clinic; Rochester Minnesota USA