Richard P. Menger, MD, MPA, Department of Neurosurgery, University of South Alabama, Mobile, AL, USARajiv R. Iyer, MD, Department of Neurosurgery, University of Utah, Salt Lake City, UT, USAMichael G. Vitale, MD, MPH, Department of Orthopedic Surgery, Columbia University, New York Presbyterian Hospital, New York, NY, USALawrence G. Lenke, MD, Department of Orthopedic Surgery, Columbia University, New York Presbyterian Hospital, New York, NY, USA