FGFR2 and intrahepatic cholangiocarcinoma: Unfortunately, our study did not include the detection of FGFR2 structural variants, so we did not compare the difference in the prevalence of FGFR2 fusions between Chinese and Western BTC patients, albeit we found that the FGFR2 genomic alteration was more prevalent in ICC (ICC vs. ECC vs. GBC, 1.4% vs. 0.5% vs. 0).