1. Centro de Investigación Perinatal, Universidad de Chile, Santiago, Chile
2. Discovery Laboratories, Inc., Warrington, PA, USA
3. South East Area Health Education Center, Department of Neonatology, Wilmington, NC, USA
4. James Cook University Hospital, Middlesbrough, UK
5. University of Medical Sciences, Poznan, Poland, and Polish Mother's Memorial Hospital Research Institute, Lodz, Poland
6. Division of Neonatal-Perinatal Medicine, University of Michigan Health System, Ann Arbor, MI, USA