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Previous studies of patients from a British - Irish population showed that the I113F mutation is the most common single mutation among MPS IVA patients and produces a severe clinical phenotype .
 Disease: MPS IVA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 Disease: MPS IVA