NR4A2 and cervical dystonia: One variant each was identified in the genes CHD6 (p.Glu2697Thrfs*29 in a patient with adolescence‐onset generalized dystonia with myoclonus and ataxia), KLC1 (c.*1+1G>A in a patient with adult‐onset cervical dystonia), and NR4A2 (p.Gln273Arg in a patient with adult‐onset cervical dystonia).