1. Department of Neurosurgery, University of Cincinnati, The Neuroscience Institute at University Hospital and The Mayfield Clinic, Cincinnati, Ohio.
2. Department of Neurosurgery, University Hospital, Antwerp, Belgium.
3. Neurosurgery-Neurotrauma Unit, University Hospital (Ospedale Maggiore), Parma, Italy.
4. Novo Nordisk Inc., Princeton, New Jersey.
5. Division of Neurosurgery, University of California, San Diego, California.