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Fig 1.

Flow chart of this study.

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Fig 2.

Wind instrument and choral music program.

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Fig 3.

Choral music program.

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Table 1.

General characteristics of subjects in each group.

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Table 2.

Comparison of respiratory related factors between the three groups.

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Table 3.

Comparison of pulmonary function levels between the three groups.

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Table 3 Expand