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(A) Stenotic degree in the S group has improved over time. Red line represents the median value of the stenotic degree. Green and blue lines represent the interquartile line of the stenotic degree. (B) Two months after operation, the growth rate was highest (12.2%) in the narrowest part of the trachea. One year after operation, the growth rate was highest (5.9%) in the distal part of the trachea. post-OP: postoperative; pre-OP: preoperative.
