Table 2 Quality evaluation of the included studies
Studies | Sample-size calculation | Inclusion and exclusion | Randomization | Allocation concealment | Reporting animals excluded from analysis | Blinded assessment of outcomes | Reporting potential conflicts of interest and study funding |
|---|---|---|---|---|---|---|---|
Yu, ZR 2012 [15] | no | no | yes | no | no | no | yes |
XU ZW 2013 [16] | no | yes | yes | no | no | no | no |
Liu, X 2016 [17] | no | no | no | no | no | no | no |
Li, KC 2016 [18] | no | no | no | no | no | no | no |
Xu, RY 2016 [19] | no | no | yes | no | no | no | yes |