5392
Her MPO - ANCA titer was 21 ELISA units ( EUs ) before PTU treatment but increased to 259 EUs at 22 days after PTU treatment .
 Chemical: PTU; Chemical: PTU
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: PTU; Chemical: PTU