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Modified Jadad Score form
| Study (year) | Randomization | Concealment of allocation | Double blinding | Withdrawals and dropouts | Score |
|---|---|---|---|---|---|
| Wang 2017 [24] | 2 | 1 | 2 | 1 | 6 |
| Gao 2017 [25] | 2 | 1 | 2 | 0 | 5 |
| Cejudo 2017 [14] | 1 | 1 | 0 | 0 | 2 |
| Mansoori 2015 [26] | 1 | 1 | 1 | 0 | 3 |
| Zheng 2014 [27] | 1 | 2 | 2 | 0 | 5 |
| Crochemore 2012 [28] | 1 | 1 | 0 | 0 | 2 |
| Fakhrzadeh 2010 [29] | 1 | 1 | 1 | 1 | 4 |
| Wong 2010 [30] | 2 | 2 | 2 | 1 | 7 |
| Kabir 2007 [31] | 1 | 1 | 1 | 1 | 4 |
| Morgan 1995 [33] | 1 | 1 | 1 | 0 | 3 |
| Pelikanova 1993 [34] | 1 | 1 | 1 | 0 | 3 |
| Hendra 1990 [35] | 1 | 1 | 1 | 0 | 3 |
