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. 2013 Apr 17;8(4):e61578. doi: 10.1371/journal.pone.0061578

Figure 4. Variation in tumor cell content as described by PCA of the choline region.

Figure 4

(A) The score plot of the choline-containing metabolite region of the spectra, colored according to the tumor cell content (%) of the corresponding biopsies. (B) The corresponding loading profile of PC1 explaining 71.3% of the total variation of the data.