By vgreene, 29 October, 2014 Last Update Fri, 04/03/2015 - 12:00 Abstract Link Free full-text PDF Is this pdf 0 PDF Link AAO-HNS pt education materials Publication Year Tue, 01/01/2013 - 12:00 Source AAO-HNS Evidence Grade A:Systematic review of cross-sectional studies; well-designed RCTs B:Individual cross-sectional studies; RCTs; or consistent evidence from observational studies C:Nonconsecutive or case-control studies; observational studies D:Mechanism-based reasoning or case reports X:Exceptional situations where validating studies cannot be performed, preponderance of benefit over harm Abbreviation AAO-HNS CBT QOL SNHL TMS