1. Department of Maternal, Newborn, Child and Adolescent Health, World Health Organization, Geneva, Switzerland.
2. Department of Mental Health and Substance Abuse, World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland.
3. Center For Perinatology, Women and Reproductive Health, Pan American Health Organization/World Health Organization, Montevideo, Uruguay.
4. Department of Reproductive Health and Research, World Health Organization, Geneva, Switzerland.
5. Department of Pandemic and Epidemic Diseases, World Health Organization, Geneva, Switzerland.
6. Division of Communicable Diseases and Health Security, World Health Organization Regional Office for Europe, Copenhagen, Denmark.
7. Department of Communicable Diseases and Health Analysis, Pan American Health Organization/ World Health Organization, Washington, USA.