Microbiome balance in sputum determined by PCR stratifies COPD exacerbations and shows potential for selective use of antibiotics.

PLoS One · 2017 · PMC5571965 · PMID 28841671

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showed a trendno p-value reported

In contrast, the GF cluster showed a trend to a higher G:F ratio at recovery and follow-up.

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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.