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Using this organ culture system, we observed the migration of medial edge epithelial cells to the nasal side, but not to the oral side.

通过器官培养体系，作者观察到中脊上皮细胞向鼻侧而不是口腔侧迁移。

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These drugs, known as PDE-5 inhibitors, can cause side effects like headaches, nasal congestion and vision problems -- and they can have dangerous interactions with the heart medication nitroglycerine.

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