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https://pubmed.ncbi.nlm.nih.gov/2042553/#:~:text=Abstract,in%20the%20face%20and%20neck.
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https://pubmed.ncbi.nlm.nih.gov/2042553/#:~:text=Abstract,in%20the%20face%20and%20neck.
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https://pubmed.ncbi.nlm.nih.gov/2042553/#:~:text=Abstract,in%20the%20face%20and%20neck.
https://www.nhs.uk/conditions/dystonia/