1. Service Delivery and Safety, World Health Organization, avenue Appia 20, 1211 Geneva 27, Switzerland.
2. Information, Evidence and Research, World Health Organization, Geneva, Switzerland.
3. Institute of Translational Medicine, Eidgenössische Technische Hochschule Zürich, Zürich, Switzerland.
4. Institute for Bioethics and Health Policy, University of Miami, Miami, United States of America.