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. 2017 Aug 21;56(18):2415–2421. doi: 10.2169/internalmedicine.8555-16
A) Clinical characteristics of participants with cervical dystonia and hemifacial spasms
No. of participants (women) Mean age (SD) Age of onset (SD)
Cervical dystonia 10 (3) 49.8 (13.3) 45.3 (16.4)
Hemifacial spasms 10 (6) 65.3 (9.1) 59.0 (11.5)

SD: standard deviation