2542
An early diagnosis appears important , and a comprehensive strategy for treatment ( neurosurgery , radioiodine , external radiotherapy , and radiosurgery ) appears advisable .
 Chemical: radioiodine
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