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. 2009 Oct 26;106(44):18803–18808. doi: 10.1073/pnas.0906932106

Fig. 1.

Fig. 1.

Representative odorant profiles from humans of various ethnicities. Total ion chromatogram obtained from human volunteers after SPME direct collection and GC-MS analysis. Regardless of ethnic background, all samples comprised of four major constituents whose peaks are labeled in the uppermost trace. Identification was confirmed with synthetic standards.