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| Study | Random Sequence Generation | Allocation concealment | Blinding of participants personnel | Blinding of outcome assessors | Incomplete outcome data | Selective outcome reporting | Other sources of bias |
| Y Liang | L | U | L | L | L | L | L |
| G Derosa | L | L | L | L | L | L | L |
| AR Rahbar | L | L | L | L | L | L | L |
| S Santo Signorelli | L | L | L | L | L | L | L |
| M González-Ortiz | L | U | L | L | L | L | L |
| M Malaguarnera | L | U | L | L | L | L | L |
| P Alavinejad | L | L | L | L | U | U | L |
| A Parvanova | L | L | L | L | U | L | L |
