Lawrence Berkeley National Laboratory, Berkeley, California, United States of America.|The James Hutton Institute, Dundee, United Kingdom.|Center for Genomic and Computational Biology, Duke University, Durham, North Carolina, United States of America.|Bioinformatics Core, Harvard School of Public Health, Boston, Massachusetts, United States of America.|The Genome Analysis Centre, Norwich, United Kingdom.|National Center for Supercomputing Applications, University of Illinois Urbana-Champaign, Urbana, Illinois, United States of America.|Smurfit Institute of Genetics, Trinity College Dublin, Dublin, Ireland.|Lawrence Berkeley National Laboratory, Berkeley, California, United States of America.