EGFR and hepatocellular carcinoma: Samples No. 3, 4, and 5, which contained different dilutions of HCC-8207 cell line DNA of T790M, were recognized by 8, 10, and 11 laboratories for samples No. 3, 4, and 5 respectively using either ddPCR, GeneReader, NGS, AmoyDx® EGFR 29 Mutations Detection Kit (AmoyDx, Xiamen, China) or EasyPGX® ready EGFR (Diatech Pharmacogenetics, Jesi, Italy).