1. Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania.
2. Department of Neurological Surgery, University of California San Francisco, San Francisco, California.
3. Department of Public Health, Center for Medical Decision Making, Erasmus Medical Center, Rotterdam, Netherlands.
4. Department of Neurosurgery, Antwerp University Hospital, Edegem, Belgium.
5. Seton Brain and Spine Institute, Austin, Texas.
6. Department of Radiology, University of California San Francisco, San Francisco, California.
7. Department of Rehabilitation Medicine, Mount Sinai School of Medicine, New York, New York.
8. Devision of Anesthesia, University of Cambridge, Cambridge, United Kingdom.
9. Department of Psychology, University of Texas, Austin, Texas.