22653
Objective : To validate the proposed Latin - American Thyroid Society ( LATS ) risk of recurrence stratification system and to compare the findings with those of the American Thyroid Association ( ATA ) risk of recurrence stratification system .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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