Research Article
Clinical, Biochemical, and ATR-FTIR Spectroscopic Parameters Associated with Death or Survival in Patients with Severe COVID-19
Figure 1
ATR-FTIR spectra of saliva samples of hospitalized patients with severe COVID-19 who survived or died. (a) Mean of the ATR-FTIR spectra of both groups, including the biological fingerprint region at 1800–800 cm−1. (b) Biochemical components assignation to the peaks. p represents the statistical significance after the Mann–Whitney U analysis.
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