1. Department of Neurosurgery, Spine Division, Duke University Medical Center , Durham, North Carolina , USA
2. Department of Neurosurgery, Montefiore Medical Center/Albert Einstein College of Medicine , New York City, New York , USA
3. Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School , Boston, Massachusetts , USA
4. Department of Neurosurgery, Zucker School of Medicine at Hofstra, Long Island Jewish Medical Center and North Shore University Hospital, Northwell Health , Manhasset, New York , USA
5. Department of Sociology, Carolina Population Center, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina , USA
6. Department of Neurosurgery, Preston Robert Tisch Brain Tumor Center, Duke University Medical Center , Durham, North Carolina , USA
7. Mayo Clinic , Jacksonville, Florida , USA