COL4A1-related brain small-vessel disease is a rare condition, although the exact prevalence is unknown. At least 50 individuals with this condition have been described in the scientific literature.
How many people are affected by COL4A1-related brain small-vessel disease ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by COL4A1-related brain small-vessel disease ? [/INST] \n COL4A1-related brain small-vessel disease is a rare condition, although the exact prevalence is unknown. At least 50 individuals with this condition have been described in the scientific literature.</s>