RETRACTED: Outcome Measurement in the Treatment of Spasmodic Dysphonia: A Systematic Review of the Literature.

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editor-in-Chief and the authors. Sections of the text and ideas contained within the introduction and discussion of this article were taken without appropriate attribution from a doctoral thesis published by Sarah Wallace, PhD at https://espace.library.uq.edu.au/view/UQ:415571. The findings presented in this systematic review remain accurate as published.