Implications of discordance in world health organization 1997 and 2009 dengue classifications in adult dengue.

PLoS One · 2013 · PMC3613419 · PMID 23573291

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may be significantno p-value reported

Our data highlighted the clinical utility of WHO 2009 in describing non-DHF manifestations of dengue that may be significant, and some areas that can be refined in WHO 2009 dengue classification.

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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.