Program in Computational Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. cmccoy@fhcrc.org|Program in Computational Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. cmccoy@fhcrc.org|Program in Computational Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. cmccoy@fhcrc.org|Program in Computational Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. cmccoy@fhcrc.org