1. Department of Neurological Surgery, University of California, San Francisco, San Francisco, California, USA;
2. Center for Clinical Informatics and Improvement Research, University of California, San Francisco, San Francisco, California, USA;
3. Institute for Health Policy Studies, University of California, San Francisco, San Francisco, California, USA;
4. University of Massachusetts Medical School, Worcester, Massachusetts, USA;
5. Brain and Spinal Injury Center, Zuckerberg San Francisco General Hospital, San Francisco, California, USA