Vitelliform macular dystrophy is a rare disorder; its incidence is unknown.
How many people are affected by vitelliform macular dystrophy ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by vitelliform macular dystrophy ? [/INST] \n Vitelliform macular dystrophy is a rare disorder; its incidence is unknown.</s>