A comparative assessment of dry eye disease among outdoor street sweepers and indoor office cleaners.

BMC Ophthalmol · 2021 · PMC8234628 · PMID 34174855

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may be significantno p-value reported

When such exposure occurs in the tropics, exposure to ultraviolet radiation may be significant.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.