1364
However , we submit that , at this time , radiolabeled animal ADME studies still provide a definitive and irreplaceable component of our understanding of the in vivo actions and behaviors of drugs and should continue to be performed prior to the exposure of large numbers of human subjects to investigative drugs .
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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:
 None