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| Study | Selection | Comparability | Outcome | Total scores |
|---|---|---|---|---|
| Chen, 2004 | 3 | 2 | 2 | 7 |
| Konofal, 2004 | 3 | 1 | 2 | 6 |
| Menegassi, 2010 | 3 | 2 | 2 | 7 |
| Juneja, 2010 | 3 | 2 | 2 | 7 |
| Kwon, 2011 | 4 | 2 | 2 | 8 |
| Mahmoud, 2011 | 3 | 2 | 2 | 7 |
| Cortese, 2011 | 4 | 2 | 2 | 8 |
| Donfrancesco, 2013 | 4 | 2 | 3 | 9 |
| Adisetiyo, 2014 | 4 | 2 | 2 | 8 |
| Bener, 2014 | 4 | 2 | 2 | 8 |
| Percinel, 2015 | 3 | 2 | 2 | 7 |
