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. 2020 Oct 2;20:723. doi: 10.1186/s12879-020-05425-5

Fig. 1.

Fig. 1

Comparison of length of hospitalization among patients with COVID-19 by patient group. Confirmed COVID-19 patients were treated with oral LPV/r alone or combined therapy of subcutaneous IFN alpha-2b injection and oral LPV/r. For combination group, patients who received IFN alpha-2b within 72 h of admission were defined as the early intervention group, while those who received IFN alpha-2b after 72 h of admission were defined as the delayed intervention group. Data are expressed as mean ± SD