Table 2 Newcastle-Ottawa Scale (NOS) quality assessment of the selected articles
| References | Study design | NOS | Quality |
|---|---|---|---|
| Abdelbaki et al. [19]. | Prospective | 8 | High |
| Alhathal et al. [20]. | Prospective | 8 | High |
| Ghazi et al. [21]. | Prospective | 8 | High |
| La Vignera et al. [22]. | Prospective | 8 | High |
| Li et al. [23]. | Prospective | 8 | High |
| Zini et al. [24]. | Prospective | 8 | High |
| Smit et al. [25]. | Prospective | 8 | High |