Familial erythrocytosis is a rare condition; its prevalence is unknown.
How many people are affected by familial erythrocytosis ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by familial erythrocytosis ? [/INST] \n Familial erythrocytosis is a rare condition; its prevalence is unknown.</s>