^*Department of Neurosurgery, Hyogo Medical University, Nishinomiya, Japan;

^‡Department of Neurosurgery, Division of Neuroendovascular Surgery, Medical University of South Carolina, Charleston, South Carolina, USA;

^§Department of Clinical Epidemiology, Hyogo Medical University, Nishinomiya, Japan;

^‖Department of Neurosurgery, Emory University School of Medicine, Atlanta, Georgia, USA;

^¶Department of Neurology, Medical University of South Carolina, Charleston, South Carolina, USA;

^#Department of Neurosurgery, Thomas Jefferson University Hospitals, Philadelphia, Pennsylvania, USA;

^**Department of Neurosurgery, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA;

^††Department of Neurosurgery, University of Washington, Seattle, Washington, USA;

^‡‡Department of Neurosurgery and Neurointerventional Radiology, Louisiana State University, Shreveport, Louisiana, USA;

^§§Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA;

^‖‖Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota, USA;

^¶¶Department of Neurology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA;

^##Department of Neurosurgery, Hospital of the University of Pennsylvania, Philadlphia, Pennsylvania, USA;

^***Department of Neurosurgery, University of Texas Medical Branch, Galveston, Texas, USA;

^†††Department of Neurologic Surgery, Mayo Clinic, Jacksonville, Florida, USA;

^‡‡‡Department of Neuroradiology, Washington Regional J.B. Hunt Transport Services Neuroscience Institute, Fayetteville, Arkansas, USA;

^§§§Department of Clinical Sciences, University of Houston, HCA Houston Healthcare Kingwood, Houston, Texas, USA;

^‖‖‖Department of Neurosurgery, Clinical Neuroscience Center, University of Utah, Salt Lake City, Utah, USA;

^¶¶¶Department of Neurological Surgery, Albert Einstein College of Medicine, Bronx, New York, USA

Correspondence: Shinichi Yoshimura, MD, PhD, Department of Neurosurgery, Hyogo Medical University, 1-1 Mukogawa, Nishinomiya663-8501, Japan. Email: [email protected]

Supplemental digital content is available for this article at neurosurgery-online.com.