5615
After 3 weeks of training a significant improvement was observed for the trained activities , from 3 . 6 to 1 . 9 standard deviations below the performance of the normal elderly controls ( P < 0 . 05 ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
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