4483
Current evidence suggests that aniridia ( absence of iris ) is caused by loss of function of one copy of the PAX6 gene , which maps to 11p13 .
 aniridia, absence of iris
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 aniridia, absence of iris