Table 2. Quality assessment of studies.
| Year | First author | Random assignment | Blind assessment | Sample size calculation | APO test | Animal welfare | Phenotype identification | Structural changes | Cell label | Peer evaluation | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010 | MM Garcia | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 6 |
| 2011 | Xuefeng Qiu | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 5 |
| 2012 | C. Sun | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 6 |
| 2012 | Hiroaki Nishimatsu | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 5 |
| 2012 | Xuefeng Qiu | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 6 |
| 2013 | Guihua Liu | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 7 |
| 2014 | Bin Ouyang | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
| 2014 | Y. He | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 5 |
| 2015 | Tao Liu | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 5 |
| 2015 | Xiyou Wang | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 7 |
APO: apomorphine.