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Table 2 Comparison of coefficients of variance for three lipid classes The raw data variability for identified lipid species of the same class is compared to the results from the NOMIS method, as well as to results adjusted for an internal standard of the same class.

From: Normalization method for metabolomics data using optimal selection of multiple internal standards

  Raw data NOMIS Internal standard
Lysophosphatidylcholines (N = 13) 0.245 0.094 0.221
Phosphatidylcholines (N = 74) 0.183 0.100 0.209
Triacylglycerols (N = 184) 0.227 0.146 0.308