23743
METHODS : A stepwise dose - escalation of allopurinol was performed in 11 azathioprine - pretreated IBD patients with inadequately low 6 - TGN concentrations ( < 235 pmol / 8 x 10 ( 8 ) erythrocytes ) and / or elevated MMPN concentrations ( > 5 , 000 pmol / 8 x 10 ( 8 ) erythrocytes ) and / or elevated liver enzymes ( alanine aminotransferase and / or aspartate aminotransferase levels one - to threefold the upper limit of normal ) .
 Chemical: allopurinol; Chemical: azathioprine; Chemical: 6 - TGN; Chemical: MMPN; Chemical: alanine; Chemical: aspartate
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: allopurinol; Chemical: azathioprine; Chemical: 6 - TGN; Chemical: MMPN; Chemical: alanine; Chemical: aspartate