2581
The effect of concurrent administration of elacridar on regional tumor distribution of erlotinib was evaluated .
 Chemical: elacridar; Chemical: erlotinib
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: elacridar; Chemical: erlotinib