Whole-exome sequencing was performed on DNA extracted from the fibroblasts of P1 and peripheral leukocytes from the parents and P2 and P3 of family A with the Sure Select All Exome V4 capture kit (Agilent) on a HiSeq2000 machine (Illumina). The statistics are provided in Table S1. BWA version 0.5.9 (Li and Durbin, 2009 (link)) and NARWHAL software (Brouwer et al., 2012 (link)) were used to align reads with the reference genome (hg19). Variants were called with GATK (version 1.2–29; McKenna et al., 2010 (link)) and SAMtools (version 0.1.13). Variants were annotated with ANNOVAR software (revision 511; Wang et al., 2010 (link)) and filtered with TIBCO Spotfire version 4.5 (Tables S1 and S2).