1. Department of Women’s and Children’s Health, University Children’s Hospital, Uppsala, Sweden
2. Norwegian Resource Centre for Breastfeeding, Women and Children’s Division, Oslo University Hospital, Oslo, Norway
3. School of Life Sciences, University of Skövde, Skövde, Sweden
4. Pediatric Department, Holbaek Hospital, Holbaek, Denmark
5. Neonatal Intensive Care Unit, Rigshospitalet, Copenhagen, Denmark, and Department of Health Sciences, Faculty of Medicine, Lund University, Lund, Sweden
6. Helsinki University Central Hospital, Children’s Hospital, Department of Neonatology, Neonatal Intensive Care Unit, K7, Helsinki, Finland
7. Faculty of Health Care and Nursing, Helsinki Metropolia University of Applied Sciences, Helsinki, Finland
8. Ministère de la Santé et des Services sociaux, Direction générale de santé publique, Quebec, Canada, and Department of Family Medicine, McGill University, Montréal, Québec, Canada