Summary of quality assessment
| Study* | Newcastle–Ottawa Scale quality assessment score | ||
|---|---|---|---|
| Selection (max 4 stars) | Comparability (max 2 stars) | Outcome (max 3 stars) | |
| 1 | ★ ★ | ★ | ★ ★ ★ |
| 2 | ★ ★ ★ | ★ | ★ ★ |
| 3 | ★ ★ ★ | ★ | ★ ★ |
| 4 | ★ ★ ★ | ★ | ★ |
| 5 | ★ ★ ★ | ★ ★ | |
| 6 | ★ ★ ★ | ★ | |
| 7 | ★ | ★ ★ | |
| 8 | ★ | ★ | ★ |
| 9 | ★ ★ | ★ | |
↵* A case series of 3 patients and a conference abstract were not included in the quality assessment.