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Aggregate PTP data for phonation onset and offset in excised canine larynges with elongated vocal folds. The upper and lower edges of the box represent the 75th and 25th percentile, respectively, and a line within each box marks the median PTF for the given elongation level. Whiskers above and below each box represent the 90th and 10th percentiles, respectively. Statistical outliers are graphed as points. PTP onset is consistently greater then PTP offset.
