Norrie disease is a rare disorder; its exact incidence is unknown. It is not associated with any specific racial or ethnic group.
How many people are affected by Norrie disease ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by Norrie disease ? [/INST] \n Norrie disease is a rare disorder; its exact incidence is unknown. It is not associated with any specific racial or ethnic group.</s>