1. Department of Clinical Medicine University of Turku Turku Finland
2. Department of Paediatrics and Adolescent Medicine Turku University Hospital Turku Finland
3. Division of Neonatology Nagano Children's Hospital Azumino Japan
4. Department of Psychology and Language Pathology University of Turku Turku Finland
5. Department of Neonatal and Infant Medicine Tallinn Children's Hospital Tallinn Estonia
6. Neonatal Unit Children's Clinic of Tartu University Hospital Tartu Estonia
7. Department of Neonatology West‐Tallinn Central Hospital Tallinn Estonia
8. Department of Nursing Science University of Turku Turku Finland