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. 2018 Sep 28;33(11):1777–1791. doi: 10.1002/mds.27460

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© 2018 The Authors. Movement Disorders published by Wiley Periodicals, Inc. on behalf of International Parkinson and Movement Disorder Society.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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CONSORT diagram outlining the flow of participants through the trial. PD‐Parkinson's disease; HC‐Healthy Control; BDI‐II Beck Depression Inventory‐II; MMSE‐Mini Mental Status Exam; ENT‐Ear Nose Throat examination.