Mark Gilbert, MD, MHSc, FRCPC1, Travis Salway Hottes, MSc1, Devon Haag, MSc1, Mark Bondyra, BFA1, Kimberly Thomson, MA1, Natalie Holgerson, RN, BScN1, Troy Grennan, MD, FRCPC1, Shannon Kopp, BA1, Christopher Fairley, PhD2, Mel Krajden, MD, FRCPC3, Mark Tyndall, MD, FRCPC1, Jean Shoveller, PhD4 and Gina Ogilvie, MD, MSc, FCFP, DrPH5, 1Clinical Prevention Services, British Columbia Centre for Disease Control, Vancouver, BC, Canada, 2Central Clinical School, Monash University, Melbourne, Australia, 3British Columbia Public Health Laboratory, Vancouver, BC, 4BC Centre for Excellence in HIV/AIDS, Vancouver, BC, 5BC Women's Hospital and Health Centre, Vancouver, BC