“…Among the 11 studies included in the meta-analysis, there were 8 retrospective studies [5,7,[12][13][14][16][17][18], one of them being a propensity-matched cohort study [19] and 3 prospective studies (One prospective cohort study and two randomized controlled trials) [6,15,19]. Seven of the 11 studies were full-length articles [5][6][7]15,16,18,19] and the remaining 4 studies were published as abstracts; however, the data on outcomes were reported [12][13][14]17]. Four studies originated from the USA [13,16,17,20], two studies originated from Korea [14,15], one study from Italy [12] and Japan [19] each, and the remaining three studies were multi-center studies from more than one country [5,6,19].…”