1. The World Health Report 2006: Working Together for Health,2006
2. Global Health Strategy. Office of Global Affairs, Department of Health and Human Services. Available at: http://www.webcitation.org/6NvO3nBc9. Accessed March 19, 2015.
3. Central Intelligence Agency World Fact Book. Available at: http://www.webcitation.org/6NvOJMLmT. Accessed March 19, 2015.
4. The US distribution of physicians from lower income countries;Torrey;PLoS One,2012
5. Global Health Observatory Data Repository. Geneva: World Health Organization. Available at: http://www.webcitation.org/6WOKmYpQX. Accessed March 19, 2015.