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. 2018 Nov 7;7:37. doi: 10.1186/s40169-018-0213-6

Fig. 2.

Fig. 2

Measuring adherence by spectroscopy using the Agilent Cary 630 FTIR Spectrometer. A vaginal swab is placed directly on the “diamond” (red arrow) whereby a laser is projected onto the swab to generate a spectral scan. The spectral scan is analyzed through discriminant model algorithms on the laptop for a final “yes” or “no” output