“…The included studies were conducted in the United States (2 studies, n = 44) 16,17 , China (17 studies, n = 413) 2,6,18-32 , India (3 studies, n = 85) 33-35 , Taiwan (5 studies, n = 162) 7,8,36-38 , South Korea (1 study, n = 18) 39 , and Turkey (1 study, n = 25) 40 . Fourteen studies used the anterior approach (10 open surgery, 4 arthroscopic surgery) 6-8,16,19,23,24,26,30,31,35,38-40 , 9 studies used the posterior approach 18,27-29,32-34,36,39 , and 11 studies used the anterior combined posterior approach 2,17,19-22,24,25,35,37,39 .…”