1. Pittsburgh NMR Center for Biomedical Research, Carnegie Mellon University, Pittsburgh, Pennsylvania.
2. Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania.
3. Safar Center for Resuscitation Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.
4. Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.
5. Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.
6. Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.