1. Inter-American Development Bank; Social Programs Division, Region 3; 1300 New York Avenue, NW Stop W0502 Washington DC USA 20577
2. University of Manchester; National Primary Care Research and Development Centre; 5th Floor, Williamson Building Oxford Road Manchester UK M13 9PL
3. Norwegian Board of Health; Department of Public Health and International Affairs; PO Box 8128 Dep N-0032 Oslo Norway
4. University of Oslo; Institute of Health Management and Health Economics; Oslo Norway N-0853
5. Huddersfield NHS Trust, Huddersfield Royal Infirmary; Clinical Development; Lindley Huddersfield UK HD3 3EA
6. 3 Cobble Court Yard Carr House Farm, Carr House Lane Lancaster Lancashire UK LA1 1SW
7. University of York; Centre for Health Economics; Heslington York Yorkshire UK YO1 5DD