14229
In some of these cases radioiodine treatment may not be effective in eradicating nodal metastases due to scant 131 - I uptake .
 Chemical: radioiodine; Chemical: 131 - I
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: radioiodine; Chemical: 131 - I