DNA extracted from frozen biopsies of the primary tumors, metastases and germline were subjected to exome capture using SureSelect Human All Exon v4 (Agilent) and to massively parallel sequencing on an Illumina HiSeq 2000 following validated protocols (19 (link)) (Supplementary Table S2, Supplementary Methods). WES data have been deposited in the Sequence Read Archive (SRP055001).
WES data processing was performed as previously described (19 (link)). Somatic single nucleotide variants (SNVs) were identified using MuTect (v1.0) (20 (link)) and somatic small insertions and deletions (indels) were identified using GATK (v2.7.4) (21 (link)) and the micro-assembly-based Scalpel (v0.1.1) (22 (link)) (Supplementary Methods).