1. Norwegian Institute of Public Health; Oslo Norway
2. University of Washington; Seattle, Washington USA
3. Department of Family Medicine and Primary Care; The University of Hong Kong; Pokfulam Hong Kong
4. The Liverpool School of Tropical Medicine; Liverpool UK
5. Department of Health and Functioning; Western Norway University of Applied Sciences; Bergen Norway
6. Department of Health Sciences; Norwegian University of Science and Technology (NTNU); Ålesund Norway
7. Health Systems Research Unit; South African Medical Research Council; Cape Town South Africa