DDON syndrome is a rare disorder; it has been reported in fewer than 70 people worldwide.
How many people are affected by deafness-dystonia-optic neuronopathy syndrome ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by deafness-dystonia-optic neuronopathy syndrome ? [/INST] \n DDON syndrome is a rare disorder; it has been reported in fewer than 70 people worldwide.</s>