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Table 1.

Parameters for the ETS-7 calculation.

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Table 2.

Results.

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Table 2 Expand

Fig 1.

Eustachian tube visible after Valsalva maneuver.

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Fig 2.

Eustachian tube not visible after Valsalva maneuver.

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Fig 3.

Eustachian tube only minimally visible before and after Valsalva maneuver.

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Fig 3 Expand

Table 3.

Comparison between the two diagnostic tools in positive and negative ETD.

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Table 3 Expand