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Figure 2: Outcome of auditory tests for the four patient groups. Means of degrees of abnormality: 0 = normal; 1 = slight abnormality; 2 = marked abnormality; 3 = strongly marked abnormality

Figure 2: Outcome of auditory tests for the four patient groups. Means of degrees of abnormality: 0 = normal; 1 = slight abnormality; 2 = marked abnormality; 3 = strongly marked abnormality