1483
However , AKR1A1 * 2 and AKR1C3 * 2 alleles did not influence AKR1A1 and AKR1C1 - AKR1C3 mRNA levels .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None