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In four patients with ALD , no major structural rearrangement in the Xqter region was observed ; in particular , there were no abnormalities in the vision blindness genes .
 ALD, abnormalities in the vision blindness genes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 ALD, abnormalities in the vision blindness genes