1. The Spine Hospital, New York Presbyterian/Columbia University Medical Center, New York, NY, USA;
2. Department of Neurological Surgery, UCSF Medical Center, San Francisco, CA, USA;
3. Department of Orthopaedic Surgery, University of Virginia School of Medicine, Charlottesville, VA, USA;
4. Department of Spine, Longhua new district Hospital, ShenZhen, China;
5. Department of Spine, ShenZhen Second People Hospital, ShenZhen, China