1. School of Nursing, University of California, San Francisco, California;
2. Institute of Child Health, University College, London, United Kingdom;
3. Centre for Nursing and Allied Health Research, Great Ormond Street Hospital, London, United Kingdom;
4. Neonatal Unit, Chelsea and Westminster Hospital, London, United Kingdom;
5. NICU, Paediatrics, Barts and the London NHS Trust, London, United Kingdom;
6. Neonatal Unit, Homerton Hospital, London, United Kingdom; and
7. Neonatal Unit, Guy's and St Thomas' Hospitals, London, United Kingdom