Bioinformatics Research Group, SRI International, Menlo Park, USA. tomlee@sri.com|Bioinformatics Research Group, SRI International, Menlo Park, USA. tomlee@sri.com|Bioinformatics Research Group, SRI International, Menlo Park, USA. tomlee@sri.com|Bioinformatics Research Group, SRI International, Menlo Park, USA. tomlee@sri.com|Bioinformatics Research Group, SRI International, Menlo Park, USA. tomlee@sri.com|Bioinformatics Research Group, SRI International, Menlo Park, USA. tomlee@sri.com|Bioinformatics Research Group, SRI International, Menlo Park, USA. tomlee@sri.com