1 Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, USA.
2 Neurology Service, Jesse Brown Veterans Administration Hospital, Chicago, IL, USA.
3 Department of Neurosurgery, School of Medicine, State University of NY at Stony Brook, NY; Editor-in-Chief, Surgical Neurological International, USA.
4 Department of Neurosurgery, UCLA, Los Angeles; Department of Neurosurgery, Loma Linda University Medical Center, Loma Linda, CA; Emeritus Editor-in-Chief and Creator, Surgical Neurological International; Editor-in-Chief, SNIDigitalâ„¢, USA.
5 James I and Carolyn Ausman Educational Foundation, Rancho Mirage, California, USA.