1. Avenir Health, Geneva, Geneva, Switzerland.
2. Ministry of Health and Social Protection, Bogotá, Bogotá, Colombia.
3. National Health Institute, Bogotá, Bogotá, Colombia.
4. International Training Center and Medical Research, Cali, Colombia.
5. National University of Colombia, Bogotá, Colombia.
6. World Health Organization, Department of Reproductive Health and Research, Geneva, Switzerland.
7. Independent consultant, London, London, United Kingdom.
8. Pan American Health Organization, Bogotá, Bogotá, Colombia.
9. Pan American Health Organization, Washington D.C., United States of America.