1 Division of Infectious Diseases and Global Public Health, University of California San Diego School of Medicine, La Jolla, CA, USA. Electronic address: sstrathdee@health.ucsd.edu.
2 Montreal, QC, Canada.
3 Division of Social Medicine, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada; Centre for Gender and Sexual Health Equity, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada.