937
Using phosphorus magnetic resonance spectroscopy we demonstrated a maximum rate of muscle mitochondrial ATP production ( V ( max ) ) below the normal range in all 12 FRDA patients and a strong negative correlation between mitochondrial V ( max ) and the number of GAA repeats in the smaller allele .
 FRDA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 FRDA