Table 4.

Quality assessment. Description in the text. * The study involved 15 patients operated bilaterally, i.e., 30 approaches were performed, 15 of which were RA. The exact number of patients who underwent RA was not reported.

First Author and Publication Date	Study Design	Number of Patients	Control Group	Level of Evidence
Blythe et al., 2016 [15]	Case report	1	-	4
Garcia y Sanchez et al., 2015 [14]	Retrospective	20	-	3
Kolk et al., 2015 [4]	Prospective	62 (22 underwent full evaluation)	Retrospective; unspecified approach	2
Bansal et al., 2012 [5]	Prospective	8–15 *	Preauricular approach	2
Arcuri et al., 2012 [7]	Retrospective	14	-	3
Benech et al., 2011 [6]	Retrospective	14	-	3
Yokoyama et al., 2011 [21]	Case report	1	-	4