Items | Selection of study population | Comparability | Outcome evaluation | Total scores |
---|
Spranz et al. [13] | ☆☆☆ | ☆ | ☆☆ | 6 |
Glanzmann et al. [14] | ☆☆☆☆ | ☆☆ | ☆☆ | 8 |
Moroder et al. [12] | ☆☆☆☆ | ☆☆ | ☆☆ | 8 |
Maier et al. [11] | ☆☆☆ | ☆☆ | ☆☆ | 7 |
Berth and Pap 2013 [3] | ☆☆☆☆ | ☆☆ | ☆☆ | 8 |
Razmjou et al. [16] | ☆☆☆ | ☆☆ | ☆☆ | 7 |