Article Text
Test yourself
A 57-year-old man with deteriorating mobility and deafness
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Footnotes
Contributors MS, JMY and RD: contributed to the writing and critical revision of the article.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed by Henry Houlden, London, UK.