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Scale-Invariant Biomarker Discovery in Urine and Plasma Metabolite Fingerprints

Zacharias, Helena ; Rehberg, Thorsten ; Mehrl, S. ; Richtmann, D. ; Wettig, Tilo ; Oefner, Peter J. ; Spang, Rainer ; Gronwald, Wolfram ; Altenbuchinger, Michael


Metabolomics data is typically scaled to a common reference like a constant volume of body fluid, a constant creatinine level, or a constant area under the spectrum. Such scaling of the data, however, may affect the selection of biomarkers and the biological interpretation of results in unforeseen ways. Here, we studied how both the outcome of hypothesis tests for differential metabolite ...


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