1. World Health Organization (2012)
  2. Amnesty International (2011)
  3. The International Federation of Health Plans (2010)
  4. U.S. Department of Health and Human Services
  5. Centers for Disease Control and Prevention (2007)
  6. Healthgrades 2012 Trends in Women's Health in American Hospitals - www.healthgrades.com
  7. Harvard Magazine - http://harvardmagazine.com/2012/11/labor-interrupted