23086
It was also found that the serum levels of triiodothyronine ( T3 ) , tetraiiodothyronine ( T4 ) and free - T4 ( FT4 ) decreased .
 Chemical: triiodothyronine; Chemical: tetraiiodothyronine
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: triiodothyronine; Chemical: tetraiiodothyronine