School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.|National HIV and Retrovirology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada.|BC Centre for Excellence in HIV/AIDS, University of British Columbia, Vancouver, British Columbia, Canada.|BC Centre for Excellence in HIV/AIDS, University of British Columbia, Vancouver, British Columbia, Canada.|Genomic Medicine Group, J. Craig Venter Institute, La Jolla, California, United States of America.|School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.