Table 2.

Levels of evidence of selected studies according to the Oxford quality scoring system [46].

Research	Level
Zamparo et al. (2005) [18]	A/1b
Knechtle et al. (2008) [41]	A/1b
Knechtle et al. A (2010) [42]	A/1b
Knechtle et al. B (2010) [43]	A/1b
Pyne et al. (2014) [2]	A/1a
Shaw et al. (2014) [19]	A/1a
VanHeest et al. (2014) [45]	A/1b
Domínguez et al. (2017) [7]	A/1a
Zamparo et al. (2020) [46]	A/1a
Jiménez-Alfageme et al. (2022) [25]	A/1b
Ben-Zaken et al. (2022) [1]	A/1b