4608
In conclusion , in this study we showed that SLC22A4 and SLC22A5 genotypes may be an important predictor of time to progression in GIST patients receiving imatinib therapy .
 Chemical: imatinib
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: imatinib