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Authors: Zirka H. Anastasian, M.D., Dorothea Strozyk, M.D., PhilipM.Meyers, M.D., Shuang Wang, Ph.D., and Mitchell F. Berman, M.D., M.P.H., have no financial interest in or affiliation with any commercial supporter or providers of any commercial services discussed in this educational material.

Editorial Author: E. Stephen Amis, Jr., M.D., has no financial interest

Editor-in-Chief: James C. Eisenach, M.D., returned a disclosure form indicating that he received consulting fees from Medtronic, Endo, and Solvay, and funded research from King Pharmaceuticals.

CME Editors: Leslie C. Jameson, M.D., and Dan J. Kopacz, M.D., have no relevant financial relationships to disclose. ASA Staff: Employees involved in planning have no relevant financial relationships to disclose.