1. Agence Nationale de la Couverture Maladie Universelle, Dakar, Senegal.
2. Graduate School of Economics, Hitotsubashi University, Tokyo, Japan.
3. Hitotsubashi Institute for Advanced Study, Hitotsubashi University, 2-1, Naka, Kunitachi, Tokyo, 186-8601, Japan.
4. Japan International Cooperation Agency, Tokyo, Japan.