1Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
2Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
3Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
4Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030, USA