Letters To The Editor
Copyright ©2011 Baishideng Publishing Group Co.
World J Gastroenterol. Nov 7, 2011; 17(41): 4640-4642
Published online Nov 7, 2011. doi: 10.3748/wjg.v17.i41.4640
Figure 1
Figure 1 Statistical power as a function of the effect size (odds ratio) in the cholangiocarcinoma cohort (black) and in extra- and intrahepatic cholangiocarcinoma subgroups (dark grey and grey, respectively) (α set at 0. 05). CCA: Cholangiocarcinoma.