Saliva-based biosensors: noninvasive monitoring tool for clinical diagnostics.

Biomed Res Int · 2014 · PMC4172994 · PMID 25276835

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highly significantno p-value reported

In addition, salivary melatonin also shows a highly significant and reproducible correlation with plasma melatonin concentration, hence making it a reliable alternative to venipuncture for pineal physiology studies among newborn infants [ 99 ].

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