1. Turku University Hospital and University of Turku; Turku Finland
2. University of Turku; Turku Finland
3. Tallinn Children's Hospital; Tallinn Estonia
4. Tartu University; Tartu Estonia
5. Hospital Gregorio Marañón; Madrid Spain
6. Department of Pediatric and Adolescent Medicine; Drammen Hospital; Vestre Viken Hospital Trust; Drammen Norway
7. University of Bergen; Bergen Norway
8. 0-3 Centre for the at-Risk Infant; Scientific Institute; IRCCS Eugenio Medea; Bosisio Parini Lecco Italy
9. Pediatrics; Department of Women's and Children's Health; Uppsala University; Uppsala Sweden
10. Huddinge Hospital; Karolinska Institutet; Stockholm Sweden