“…1). There were 3 Level II studies, [52, 71, 87], 14 Level III studies [10, 18, 39, 42, 49, 50, 53, 55, 56, 62, 63, 65, 68, 76], and 69 Level IV studies [3, 4, 6, 8, 9, 11–13, 15–17, 19–33, 35, 37, 38, 41, 43, 45, 47, 48, 51, 54, 57–61, 64, 66, 67, 69, 72–75, 77–81, 84–86, 88–95]. The mean MINORS score was 18 for the 14 comparative studies and 8 for the 69 noncomparative studies.…”