Flowchart (IMAGE) Journal of Neurosurgery Publishing Group Caption This is a flowchart showing changes in opioid dependence among patients who underwent surgery for degenerative spondylolisthesis. Credit (c) American Association of Neurological Surgeons. Usage Restrictions Permission must be requested. Contact firstname.lastname@example.org. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.