1. Pediatric Neurosurgery, Children's Hospital, Birmingham, Alabama
2. Department of Medical Anatomical Sciences, Western University of Health Sciences, COMP-NW, Lebanon, Oregon
3. Orthopedic Department, Samaritan Healthcare, Corvallis, Oregon
4. General Surgery Department, Samaritan Healthcare, Corvallis, Oregon
5. Department of Surgery, Oregon Health & Science University, Portland, Oregon
6. Orthopedics & Rehabilitation, Oregon Health & Science University, Portland, Oregon. Oral Maxillofacial Surgery, Oregon Health & Science University, Portland, Oregon
7. Department of Anatomical Sciences, St. George's University, Grenada, West Indies
8. Goodman Campbell Brain and Spine, Indiana University Department of Neurological Surgery, Indianapolis, Indiana