17084
Blood , urine , and feces were collected over an extended period of 14 days , and accelerator mass spectrometry was used to quantify low levels of radioactivity in plasma at later time points to supplement the less - sensitive liquid scintillation counting technique .
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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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