No. | First author, country | Selection | Comparability | Outcome | Total | ||||
---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 1 | 2 | ||||
1. | Al Kasab S; North and South America, Europe [45] | * | * | * | ** | * | * | * | 8 |
2. | Cox M, USA [46] | * | * | Â | ** | Â | * | * | 6 |
3. | Havenon Ad, USA [48] | * | * | Â | ** | * | * | * | 7 |
4. | Kerleroux B, France [28] | * | * | Â | ** | * | * | * | 7 |
5. | Kwan J, UK [49] | * | * | Â | ** | * | * | * | 7 |
6. | McConachie D, UK [51] | * | * | Â | ** | * | * | * | 7 |
7. | Pop R, France [52] | * | * | Â | ** | * | * | * | 7 |
8. | Qureshi A I, USA [54] | * | Â | Â | * | * | * | * | 5 |
9. | Yang B, China [29] | * | * | * | ** | * | * | * | 8 |