1 Department of Reproductive Health and Research including UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction, World Health Organisation, Avenue Appia 20, 1211, Geneva, Switzerland. kabrar@who.int.
2 22 chemin Henry Wissner, Grand Lancy, 1212, Geneva, Switzerland. kabrar@who.int.
3 Department of Reproductive Health and Research, World Health Organisation, Geneva, Switzerland.
After publication of the original article [1], it came to the authors' attention that the Acknowledgements section was not completed correctly. The Acknowledgements of the article should have been as follows.