1. VA Palo Alto Health Care System, VA Cooperative Studies Program Coordinating Center, VA HSR&D Health Economics Resource Center, Menlo Park, California (VRJ, PGB)
2. Centre for Health Evaluation and Outcome Sciences, St. Paul’s Hospital, Vancouver, British Columbia, Canada (HS, NB, AHA)
3. Canadian HIV Trials Network, Vancouver, British Columbia, Canada (HS)
4. School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada (NB, AHA)
5. Centre for Health Economics, University of York, York, UK (SCG, MS)