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Mass spectrometry imaging (MSI) images of the spatial distribution of metabolites in esophageal squamous cell carcinoma (ESCC) tissue sections. GPC: glycerophosphorylcholine; GPE: glycerophosphorylethanolamine; FA: fatty acid; PC: phosphatidylcholine; PI: phosphatidylinositol; PE: phosphatidylethanolamine; PS: phosphatidylserine. Reproduced from Ref. [46] with permission.
