Study Exclusion reasons Remarks Reference(s)
Murohashi, 2020 prospective cohort no control group

Murohashi K Respir Investig 2020 Aug 28;58(6):430-434. 10.1016/j.resinv.2020.08.001

Erdem, 2020 retrospective cohort (registry) no control group

Erdem HA Turk J Med Sci 2020 Nov 25. 10.3906/sag-2008-33

Yamamura, 2020 single-arm no control group

Yamamura H Crit Care 2020 Jul 9;24(1):413. 10.1186/s13054-020-03137-5

Dabbous, 2021 randomized controlled trial other Withdrawal of the publication.

Dabbous HM Arch Virol 2021 Jan 25;1-6. 10.1007/s00705-021-04956-9