1. Department of Critical Care Medicine, The Safar Center for Resuscitation Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennyslvania, USA
2. Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, Pennyslvania, USA
3. Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennyslvania, USA
4. The Children's Hospital of Pittsburgh, Pittsburgh, Pennyslvania, USA
5. Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennyslvania, USA