Table 3 Main outcomes and evaluated parameters.

↑ Lymphocyte count

^{11,15,19,20,21,22,28,29,32,34,36,63}

↓ C-reactive protein level

^{11,12,16,17,19,20,21,22,29,30,32,34,36}

↓ IL-6

^{11,12,14,17,19,21,22,35,36}

↓ TNF-α

^{12,14,19,21,34}

↓ Ferritin

^{17,22,28,29,32}

↓ D-dimer

^{11,15,16,22,29,32}

Pulmonary parameters

Studies

↑ PaO2/FIO2 (Horowitz index) or P/F ratio

^{11,13,16,17,20,21,28,29,30,31,33,63}

↑ Oxygen saturation

^12,19,34

Improvement on chest CT/radiography

^{12,16,17,18,19,20,23,24,25,30,32,34,35,36,38}

Other parameters

Studies

↑ Survival/↓Mortality

^{14,16,22,23,28,29}

Clinical improvement

^{12,13,18,20,21,22,24,25,29,30,32,34,36,37,38,63}

Improvement on hospital discharge

^{12,14,22,28,29,33}

Discontinuation of oxygen support (intubation, ECMO)

^{13,16,20,22,24,25,28,29,30,32,33}