1. Department of Pediatrics and Child Health, University of Otago, Wellington, New Zealand
2. Neonatal Intensive Care Unit, Wellington Regional Hospital, Wellington, New Zealand
3. Centre for Translational Physiology, University of Otago, Wellington, New Zealand
4. New Zealand Blood Service, Wellington Regional Hospital, Wellington, New Zealand
5. School of Medical Science, University College, Dublin, Ireland
6. Faculty of Science, Liverpool John Moores University, Liverpool, United Kingdom