RT Journal Article SR Electronic T1 Foreword JF International Journal of Spine Surgery JO Int J Spine Surg FD International Society for the Advancement of Spine Surgery SP 123 OP 124 DO 10.1016/j.esas.2009.11.002 VO 3 IS 4 A1 Frank W. Chan A1 Vijay K. Goel YR 2009 UL http://ijssurgery.com//content/3/4/123.abstract AB