1 The Health Economics Unit, Centre for Health Economics, The University of the West Indies, St. Augustine Campus, Trinidad and Tobago.
2 Avenir Health, Fountain Hills, Arizona, USA.
3 UNAIDS, Investment and Sustainability Team, Geneva, Switzerland.
4 Global Health Policy, School of International Policy and Governance, Wilfrid Laurier University and Balsillie School of International Affairs, Waterloo, Canada.