1. The Kirby Institute for Infection and Immunity in Society; The University of New South Wales; Sydney Australia
2. Department of Statistics; University of Washington; Seattle WA USA
3. Division of Infectious Diseases; Department of Medicine; University of British Columbia; Vancouver British Columbia Canada
4. British Columbia Centre for Excellence in HIV/AIDS; St. Paul's Hospital; Vancouver British Columbia Canada
5. British Columbia Centre for Disease Control; Vancouver British Columbia Canada
6. Division of Infectious Diseases; Department of Medicine; University of Ottawa; Ottawa Ontario Canada