Targeted capture and sequencing analysis of all samples was performed using CAPP-Seq (17 (link)). We employed a 302-kb CAPP-Seq selector targeting 771 noncontiguous regions of the human genome, spanning 276 genes (18 (link)). A maximum of 32 ng DNA was input into sequencing library preparation. For plasma and BAL fluid samples with less than 32 ng of isolated cell-free DNA (cfDNA), all the extracted cfDNA was used for library preparation, down to a minimum of 16 ng. Samples were sequenced using 2 × 100 or 2 × 150 reads on an Illumina HiSeq 2500 or 4000. Sequencing data were processed using a previously described bioinformatics pipeline (12, 17 (link)). SNVs and indels were genotyped in all samples (17 (link)).