1. Uppsala University, University Children’s Hospital, Uppsala, Sweden
2. Oslo University Hospital, Oslo, Norway
3. University of Skövde, Skövde, Sweden
4. Holbaek Hospital, Holbaek, Denmark
5. Lund University, Lund, Sweden
6. Children’s Hospital, Department of Neonatology, Helsinki University Central Hospital, Neonatal Intensive Care Unit, K7, Helsinki, Finland
7. Metropolia University of Applied Sciences, Metropolia, Finland
8. Helsinki University Central Hospital, Department of Gynaecology and Pediatrics, Helsinki, Finland
9. Ministère de la Santé et des Services Sociaux, Direction Générale de Santé Publique, Québec, Canada and Department of Family Medicine, McGill University, Montréal, Québec, Canada