4304
The serum of six affected workers and five controls was tested for autoantibodies that react with human liver cytochrome - P450 2E1 ( P450 2E1 ) and P58 protein disulphide isomerase isoform ( P58 ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 None