1. Evidence-based maternity care: what it is and what it can achieve;Sakala,2008
2. Rates of cesarean delivery—United States, 1991. Centers for Disease Control and Prevention (CDC);Morb Mortal Wkly Rep,1993
3. Births: preliminary data for 2007;Hamilton;Natl Vital Stat Rep,2009
4. Recent trends and patterns in cesarean and vaginal birth after cesarean (VBAC) deliveries in the United States;MacDorman;Clin Perinatol,2011
5. Organization for Economic Cooperation and Development. OECD health data 2013. Available at: http://www.oecd.org/health/health-systems/oecdhealthdata2013-frequentlyrequesteddata.htm. Accessed Feb. 10, 2014.