Table 5 Quality assessment
Study | Study design | Study type | Definitive grade |
|---|---|---|---|
Park 2015 | Retrospective | Non-randomized controlled trial | B |
Huang 2016 | Prospective | Non-randomized controlled trial | B |
Feu 2017 | Prospective | Non-randomized controlled trial | B |
Pelo 2017 | Prospective | Randomized controlled trial | B |