“…The characteristics of eligible studies are listed in Table 1. The review included four retrospective cohort studies 12,21,28,30 , two retrospective comparative studies 36,40 , five prospective randomized clinical trials 16,17,26,38,39 , two prospective comparative studies 25,29 , fifteen clinical series/letters to the editor 10,11,[13][14][15]18,19,[22][23][24]27,32,33,35,37 , two randomized controlled trials (RCTs) 20,31 and one nonrandomized controlled trial (NRCT) 34 .…”