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(A) The panel showed a direct view of a dissected skull with the lines of reference for the measured angles indicated. (B) The panel showed a graphic comparison of the mean values for angles L and R between mutant (n = 8) and wild-type (n = 8) mice. There is no significant difference in Eustachian tube angles between the wild-type and the mutant mice (Student t test, P>0.05). Error bars indicate the SEM.
