1. School of Education, Health and Social Studies, Dalarna University, 791 88 Falun, Sweden
2. Centre for Clinical Research Dalarna, Uppsala University, 791 82 Falun, Sweden
3. Department of Pediatrics, Falu Hospital, 791 82 Falun, Sweden
4. Department of Women’s and Children’s Health, Uppsala University, 752 36 Uppsala, Sweden
5. Division of Neonatology, Department of Pediatrics, University Medical Center of the Johannes Gutenberg, University Mainz, 55131 Mainz, Germany
6. Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, 171 77 Stockholm, Sweden
7. Department of Women’s and Children’s Health, Karolinska Institutet, 171 77 Stockholm, Sweden