Indexed genomic DNA libraries were prepared from genomic DNA using TruSeq DNA Preparation Kit (Illumina, San Diego, CA, USA) and exome capture using TruSeq Exome Enrichment Kit (Illumina), according to the manufacturer’s protocol. Sequencing was performed with 100 bp paired-end reads on a HiSeq2000 (Illumina). Reads were aligned to the human reference genome with NovoAlign (Novocraft Technologies, Selangor, Malaysia) or Burrows-Wheeler Aligner.18 (link) Variants were called with SAMtools19 (link) and annotated with SeattleSeq. Coverage across genomic intervals was calculated using BEDTools.20 (link) Genomic coordinates for regions targeted by the whole-exome capture kit were provided by Illumina. Whole exome sequences from 62 sIBM patients were filtered for variants that: 1) had a minor allele frequency of ≤0.001 in the ExAC Database; 2) generated a loss of function variant or a nonsynonymous change; and 3) fulfilled a strict sequence quality as defined by Genesis 2.0 software.