3406
Analysis of the stability of HAH - cortisol showed that it was stable at pH 7 . 4 and broke down rapidly ( t1 / 2 15 min ) at pH 4 . 8 at 37 degrees C .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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