6. | Kurdi et al. (2016) [18] | NR | NR | NR | NR |
7. | Alhunaishel et al. (2016) [19] | <14 years | 27 | 26 | 91 |
8. | Al-Anazi et al. (2017) [20] | 12 months | 85 | 125 | 40 |
9. | Al-Mohrej et al. (2017) [21] | 3 months | 50 | 44 | 88 |
10. | Assaf (2018) [22] | <24 months | 72 | 92 | 60 |