Fig. 4. Development of the epineurium and perineural space from 30 to 40 weeks. (A) Scatter plot showing the relationship between gestational age and cross-section morphometry of the perineurium in right (I) and left (II) recurrent laryngeal nerves. (B) Scatter plot showing the relationship between gestational age and cross-section morphometry of the perineural space in right (I) and left (II) recurrent laryngeal nerves. Linear regression equation, correlation coefficient and probability values are represented by y, R, and P within the plots.
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