1. Department of Neurosurgery, Texas A&M School of Medicine, Bryan, Texas, USA;
2. Department of Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA;
3. Department of Neurosurgery, Howard University, Washington, District of Columbia, USA;
4. Department of General Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA;
5. Department of Neurosurgery, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA;
6. Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, Ohio, USA;
7. Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio, USA