<s>[INST] <<SYS>> This is a medical question of type : frequency <</SYS>> How many people are affected by dilated cardiomyopathy with ataxia syndrome ? [/INST] DCMA syndrome is a very rare disorder. Approximately 30 cases have been identified in the Dariusleut Hutterite population of the Great Plains region of Canada. Only a few affected individuals have been identified outside this population. </s>