Cockayne syndrome occurs in about 2 per million newborns in the United States and Europe.
How many people are affected by Cockayne syndrome ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by Cockayne syndrome ? [/INST] \n Cockayne syndrome occurs in about 2 per million newborns in the United States and Europe.</s>