1. Health Sector Management Program, The Fuqua School of Business
2. Department of Economics, Duke University, Durham, NC 27708, USA.
3. Division of Infectious Diseases
4. American International Health Alliance, Moscow 125047, Russia.
5. Division of General Internal Medicine, Department of Medicine, Duke University School of Medicine, Durham, NC 27710, USA.
6. Center for Clinical and Genetic Economics, Duke Clinical Research Institute, Duke University Medical Center, Durham, NC 27715, USA.