1. Department of Neurological Surgery, Rutgers New Jersey Medical School, Newark, New Jersey;
2. Department of Neurological Surgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania;
3. Department of Neurological Surgery, Barrow Neurologic Institute, Phoenix, Arizona;
4. Department of Neurological Surgery, University of Texas Health San Antonio, Texas;
5. Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania; and
6. Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri