Green design of a paper test card for urinary iodine analysis.

PLoS One · 2017 · PMC5489186 · PMID 28658293

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an unexpected trendno p-value reported

The 100 μg I/L test solution exhibited an unexpected trend in color development, becoming bluer over time instead of redder.

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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.