In order to detect the integration of HBV DNA into human genome, targeted HBV DNA fragment capture sequencing was performed. DNA was extracted from tumor tissues and matched non-tumor tissues using GeneReadTM DNA FFPE Kit (QIAGEN, Hilden, Germany). Sequence-capture probes according to eight types (A, B, C, D, E, F, G and H) of HBV genome sequences were produced by MyGenostics (Beijing, China). Detailed targeted HBV DNA fragment capture sequencing procedure was carried out according to a previous report.16 (link) Then, high-throughput viral integration detection (HIVID) method was used for the detection of breakpoints.17 (link) After removal of low-quality reads and duplication reads, sequenced datasets were compared against both HBV and human (hg19) reference sequences using Burrows-Wheeler Aligner (BWA). Integration sites were determined through Clipping Reveals Structure (CREST) analysis.