984
To assess whether thallium - 201 thallous chloride ( Tl ) can detect childhood tumors and whether diagnostic effectiveness improves with combined blood flow imaging , 28 children ( 1 . 0 - 18 . 6 years ) were studied using single photon emission computed tomography ( SPECT ) : Tl ( 1 . 3 - 1 . 8 mCi intravenously ) , followed in 13 of the patients by technetium - 99m - hexamethylpropyleneamine oxime ( 99mTc - HMPAO ; 8 - 18 mCi intravenously ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None