12273
The moduli of elasticity of the gray and white matter were 3 . 4 + / - 1 . 4 kPa ( mean + / - standard deviation ) and 3 . 4 + / - 0 . 9 kPa in the axial section , 3 + / - 0 . 3 kPa and 3 . 5 + / - 0 . 5 kPa in the frontal section , and 3 . 5 + / - 0 . 9 kPa and 2 . 8 + / - 0 . 4 kPa in the sagittal section , respectively .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
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