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The density of goblet cells and glands was determined in the maxillary, ethmoidal, frontal, and sphenoidal sinuses. Goblet cells showed the highest density in the maxillary sinuses. 9700 per mm2, while in the other sinuses their density was approximately the same, from 5 900 to 6 500 cell per mm2. The density of glands was highest in the ethmoids, 0.5 gland/mm2, then in the maxillary sinuses, viz. 0.2 gland/mm2, while in the frontal and sphenoidal sinuses it was very low, 0.08 and 0.06 gland/mm2 respectively.
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Tos et al. (1978) studied this question.
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