Barbara Stilwell1
, Khassoum Diallo2
, Pascal Zurn3
, Mario R Dal Poz4
, Orvill Adams5
and James Buchan6 
1
Scientist, Department of Health Service Provision, World Health Organization, Geneva
2
Demographer, Department of Health Service Provision, World Health Organization, Geneva
3
Health Economist, Department of Health Service Provision, World Health Organization, Geneva
4
Coordinator of Human Resources for Health, Department of Health Service Provision, World Health Organization, Geneva; Associate Professor and former Deputy Director, Social Medicine Institute, University of the State of Rio de Janeiro, Brazil
5
Director, Department of Health Service Provision, World Health Organization, Geneva
6
Professor, Faculty of Social Sciences and Health Care, Queen Margaret University College, Edinburgh, United Kingdom