Bart-Pumphrey syndrome is a rare disorder; its exact prevalence is unknown. Only a few affected families and individual cases have been identified.
How many people are affected by Bart-Pumphrey syndrome ?
<|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 Bart-Pumphrey syndrome ?<|eot_id|><|start_header_id|>assistant<|end_header_id|> Bart-Pumphrey syndrome is a rare disorder; its exact prevalence is unknown. Only a few affected families and individual cases have been identified.<|eot_id|>