Danon disease is a rare condition, but the exact prevalence is unknown.
How many people are affected by Danon disease ?
<|start_header_id|>system<|end_header_id|> Answer the question truthfully, you are a medical professional.<|eot_id|><|start_header_id|>user<|end_header_id|> This is the question: How many people are affected by Danon disease ?<|eot_id|><|start_header_id|>assistant<|end_header_id|> Danon disease is a rare condition, but the exact prevalence is unknown.<|eot_id|>