21883
OBJECTIVE : For patients , who remain hypothyroid despite the administration of what would seem adequate doses of levothyroxine , the underlying cause can be difficult to determine .
 Chemical: levothyroxine
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: levothyroxine