@inbook{5010033, author={Michael Bailin and Spiro Spanakis}, title={Practice Advisory for Perioperative Visual Loss (POVL) Associated with Spine Surgery}, booktitle={Guidelines}, publisher={The McGraw-Hill Companies, Inc.}, address={New York, NY}, year={2000}, url={accessanesthesiology.mhmedical.com/content.aspx?aid=5010033} }