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An excellent review of proteomic biomarkers is the publication: "Proteomics in cancer biomarkers discovery: challenges and applications." Sallam RM1. Dis Markers. 2015;2015:321370. doi: 10.1155/2015/321370.
Also: Identification of protein biomarkers in human serum using iTRAQ and shotgun mass spectrometry Methods Mol Biol. 2013;1061:291-307. doi: 10.1007/978-1-62703-589-7_18. Koutroukides TA1
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