4695
Alanine aminotransferase ( ALT ) levels had been elevated for six months in all patients and hepatitis B viral infection was replicative .
 Alanine aminotransferase, ALT
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Alanine aminotransferase, ALT