Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA. brendanx@u.washington.edu|Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA. brendanx@u.washington.edu|Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA. brendanx@u.washington.edu|Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA. brendanx@u.washington.edu|Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA. brendanx@u.washington.edu|Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA. brendanx@u.washington.edu|Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA. brendanx@u.washington.edu|Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA. brendanx@u.washington.edu|Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA. brendanx@u.washington.edu|Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA. brendanx@u.washington.edu