1. Center for Neurosurgical Outcomes Research, Maxine Dunitz Neurosurgical Institute Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, CA, USA
2. Department of Surgery, Division of Acute Care Surgery, Cedars-Sinai Medical Center, Los Angeles, CA, USA
3. Department of Physical Medicine and Rehabilitation, Cedars-Sinai Medical Center, Los Angeles, CA, USA