Fig. A1. PRISMA Flowchart
Table A1. Summary of included studies
| № | Author/study name | Year | Country | Number of patients | Result |
|---|---|---|---|---|---|
| 1 | L. Li et al. | 2020 | China | 103 | positive |
| 2 | A. Agarwal et al. (PLACID study) | 2020 | India | 464 | negative |
| 3 | X. Xia et al. | 2020 | USA | 1568 | positive |
| 4 | S.T.H. Liu et al. | 2020 | USA | 195 | positive |
| 5 | A. Gharbharan et al. | 2020 | Netherlands | 86 | positive |
| 6 | H. Abolghasemi et al. | 2020 | Iran | 189 | positive |
| 7 | K. Duan et al. | 2020 | China | 20 | positive |
| 8 | A.M. Rasheed et al. | 2020 | Iraq | 49 | positive |
| 9 | A. Casadevall et al. | 2020 | USA | 103 | positive |
| 10 | F. Altuntas et al. | 2020 | Turkey | 1776 | positive |
| 11 | C. Perotti et al. | 2020 | Italy | 69 | positive |
| 12 | A.S. Omrani et al. | 2020 | Qatar | 80 | positive |
| 13 | R. Rogers et al. | 2020 | USA | 241 | positive |
| 14 | E. Salazar et al. | 2021 | USA | 903 | positive |
| 15 | V.A. Simonovich et al. | 2021 | Argentina | 333 | positive |
| 16 | C. Avendano-Sola et al. | 2021 | Spain | 350 | positive |
| 17 | M.L. Donato et al. | 2021 | USA | 1387 | positive |
| 18 | E. Bennett-Guerrero et al. | 2021 | USA | 74 | positive |
| 19 | S. Körper et al. | 2021 | Germanу | 105 | positive |
| 20 | M.J. Joyner et al. | 2021 | USA | 47 047 | positive |
| 21 | R. Libster et al. | 2021 | Argentina | 160 | positive |
| 22 | RECOVERY Collaborative Group | 2021 | UK | 11 558 | negative |
| 23 | The CONCOR-1 Study Group | 2021 | Canada, USA, Brazil | 614 | negative |
| 24 | REMAPCAP study | 2021 | UK | 1084 | negative |
| 25 | F.K. Korley et al. (C3PO study) | 2021 | USA | 511 | negative |
| 26 | M.R. O’Donnell et al. | 2021 | USA, Brazil | 223 | positive |
| 27 | TSUNAMI study | 2021 | Italy | 417 | negative |
| 28 | M.B. Ortigoza et al. | 2021 | USA | 941 | neutral |
| 29 | М.А. Thompson et al. | 2021 | USA | 966 | positive |