1. Independent Consultant, Brooklyn, NY, USA.
2. Visiting Fellow, Global Health Centre, Geneva Graduate Institute, Geneva, Switzerland
3. Honorary Assistant Professor, London School of Hygiene and Tropical Medicine, London, UK
4. Senior Researcher, Health Policy Unit, Department of Public Health, Institute of Tropical Medicine, Antwerp, Belgium
5. Distinguished Fellow Emeritus, RTI International, Washington DC, United States
6. South African Research Chair in Health Systems, Complexity, and Social Change, School of Public Health, University of the Western Cape, Bellville, South Africa