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Smooth muscle‐associated innervation. (A) Number of nerves (NBN‐ASM) and (B) cumulative nerve area (CNA‐ASM) within or lining airway smooth muscle (ASM) corrected for the internal perimeter squared (μm2) in the peribronchial region of horses with asthma (n = 8) and controls (n = 8). (C) Airway smooth muscle area (ASM; μm2) of horses with asthma (n = 8) and controls (n = 8). Horizontal lines represent the median, and the error bars represent the interquartile range.
