最終更新日：2024/08/08
The Waldeyer's rings are a group of lymphoid tissue in the pharynx.
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The Waldeyer's rings are a group of lymphoid tissue in the pharynx.
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The Waldeyer's rings are a group of lymphoid tissue in the pharynx.
The Waldeyer's rings are a group of lymphoid tissue in the pharynx.
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