DNA extracted from peripheral blood was analyzed using a capture-based approach with custom-designed probes (KAPA HyperExplore Max 3 Mb T1, NimbleGen, Roche) targeting all coding exons and 20 bp of flanking intronic regions of 52 genes involved in hereditary predisposition to cancer. Sample preparation was performed according to the SeqCap EZ HyperCap Workflow (Roche NimbleGen, Pleasanton, CA) as previously described.19 (link) Sequencing was performed on the DNBSEQ-G400 NGS platform (MGI Tech, Beishan Industrial Zone, Shenzhen, PR China).