“…Due to the heterogeneity of published studies, a meta-analysis was not appropriate; thus, the results are described qualitatively. Based on the Oxford Centre for Evidence-Based (OCEBM) 2011 Levels of Evidence, 63 most studies (n=35, 64.8%) were Level 4 (13 case reports 20,[22][23][24][25][26][42][43][44]48,50,54,62 , 12 case series [9][10][11][12]14,33,34,46,47,49,55,56 , and 10 historical cohort studies 17,31,36,37,40,41,51,[57][58][59] ), whereas the remainder 19 (35.2%) were Level 3 (8 cohort studies 15,19,21,27,28,32,39,60,64 , 8 cross-sectional studies 13,16,18,29,30,38,…”