“…The OR in the autologous control subgroup was 17.69 (95%CI, 12.51-25.02; P < 0.001) and the OR in the heterogeneous control subgroup was 32.43 (95%CI, 12.44-84.53; P < 0.001) (Figure 2). In the subgroup analysis of ethnicity, the OR for the Caucasian subgroup was 26.55 (95% CI, 10.86-64.88; P < 0.001) from 4 studies Guo et al, 2004;Wang et al, 2004;Dammann et al, 2005), for the Asian subgroup was 20.94 (95% CI, 14.41-30.43; P <0.001) from 14 studies Ito et al, 2005;Chen et al, 2006;Hsu et al, 2007;Kim et al, 2007;Yanagawa et al, 2007;Yang et al, 2007;Liu et al, 2008;Lin et al, 2009;Peng et al, 2010;Zhang et al, 2010;Kang et al, 2011;Song et al, 2011;Li et al, 2012) (Figure 2).…”