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. 2019 May 7;24(5):055001. doi: 10.1117/1.JBO.24.5.055001

Fig. 9.

Fig. 9

(a) SERS measurement of saliva samples on VFA-T1, T3, and T21 for health groups as well as M1, M5, and M7 for OSCC patients (*Mann–Whitney test: p<0.05) and (b) corresponding photographic image of VFA-chip for the absence of saliva sample.