Program in Computational Biology and Bioinformatics, Duke University, Durham, NC, USA.|Department of Human Genetics, Eccles Institute of Human Genetics, University of Utah and School of Medicine, Salt Lake City, UT, USA.|Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA.|Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA.|Department of Human Genetics, Eccles Institute of Human Genetics, University of Utah and School of Medicine, Salt Lake City, UT, USA.|Program in Computational Biology and Bioinformatics, Duke University, Durham, NC, USA.