*Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY
†The Orthopaedic Center of St Louis, Chesterfield, MO
‡Spinal Neurosuergery, Department of Neurosurgery, UCLA David Geffen School of Medicine, Cedars Sinai Institute for Spinal Disorders
§Department of Neurosurgery, UCLA David Geffen School of Medicine, Los Angeles, CA
∥Lehigh Valley Health Network, Allentown, PA
¶Central Texas Spine Institute, Austin, TX
#Hughston Clinic Main, Columbus, GA
J.M.L. is a consultant and receives royalties from Medtronic. K.D.R. is a consultant and receives royalties from Medtronic. M.F.G. is a consultant and receives royalties from Medtronic. The remaining authors declare no conflict of interest.
Reprints: Joseph M. Lombardi, MD, Department of Orthopaedic Surgery, Columbia University Medical Center, 622 W. 168th St PH-11 New York, NY 10032 (e-mail: [email protected]).