The URLs for data presented herein are as follows:dbSNP, http://www.ncbi.nlm.nih.gov/projects/SNP/ Human Genome Variation Society, http://www.hgvs.org/mutnomen/ Online Mendelian Inheritance in Man (OMIM), http://www.omim.org/ NHLBI Exome Sequencing Project (ESP) Exome Variant Server, http://evs.gs.washington.edu/EVS/ RefSeq, http://www.ncbi.nlm.nih.gov/RefSeq