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DPP4 concentration in COVID-19 patients stratified: a) without invasive mechanical ventilation (IMV) (n = 57, 49.2 [39.9–65.6] ng/mL) and with IMV (n = 50, 42.8 [29.8–56.9] ng/mL) and b) those who recovered (n = 74, 48.9 [35.8–63.1] ng/mL) and who died (n = 28, 42.5, [30.3–55.6] ng/mL). The analysis of mortality was made in 102 patients, because 5 patients were transferred to another hospital and we did not know the outcome.
