The incidence of Marfan syndrome is approximately 1 in 5,000 worldwide.
How many people are affected by Marfan syndrome ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by Marfan syndrome ? [/INST] \n The incidence of Marfan syndrome is approximately 1 in 5,000 worldwide.</s>