290 Stem Material and Taper Design are Risk Factors for Failure in Revision Total Hip Arthroplasty when New Metal Heads are Placed on a Retained Femoral Stem

e499 No Difference Exists in Total Cost of Care Between Orthopaedic Surgeons and Neurosurgeons for Patients Undergoing Primary 1- and 2-Level Decompression and Fusion

P270 An International Consensus based on the Delphi Method to Define Failure of Medical Treatment in Pyogenic Spinal Infections