Adam S. Arthur MD MPH FAANS FAHA FACSProfessor of NeurosurgeryUniversity of Tennessee Health Sciences CenterSemmes-Murphey Neurological and Spine ClinicMemphis, TNUSA Kevin T. Foley, MD, FACSProfessor of Neurosurgery, Orthopaedic Surgery, & Biomedical EngineeringUniversity of Tennessee Health Science CenterChairman, Semmes-Murphey ClinicMemphis, TN USA C. Wayne Hamm CRNA, MSN, APNGermantown, TN USA