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(A) The distribution of JIs between the first and second experiments in each rater. The JIs of the group using the binarization method (Groupbi) were significantly higher than those of the group using the freehand method (Groupfr, P = 0.002). (B) The distribution of JIs between the different raters in each of the two groups (Groupbi and Groupfr). The JIs of Groupbi were significantly higher than those of Groupfr (P = 0.005).
