Affiliation: | aDepartment of Country Cooperation and Collaboration with the UN System, World Health Organization, avenue Appia 20, 1211 Geneva 27, Switzerland.;bWorld Health Organization, Pretoria, South Africa.;cWorld Health Organization, New Delhi, India.;dWorld Health Organization, Moscow, Russian Federation.;ePan American Health Organization and World Health Organization, Brasília, Brazil.;fWorld Health Organization, Beijing, China. |