From dysphonia to dysphoria: Mokken scaling shows a strong, reliable hierarchy of voice symptoms in the Voice Symptom Scale questionnaire☆
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☆ The work was undertaken by The University of Edinburgh Centre for Cognitive Ageing and Cognitive Epidemiology, part of the cross council Lifelong Health and Wellbeing Initiative.
PII: S0022-3999(09)00261-X
doi:10.1016/j.jpsychores.2009.06.008
© 2010 Elsevier Inc. All rights reserved.
