Table 1.

Average Downs and Black scores for included studies

Reference	Downs & Black Score	Downs & Black Category
Arad et al. [17]	15	Poor
Blue et al. [18]	16	Poor
Chiu et al. [19]	18	Fair
Domene et al. [20]	17	Poor
Ross et al. [21]	16	Poor
Svensson et al. [14].	17	Poor
Utter et al. [22]	20	Fair