1. World Health Statistics 2009,2009
2. Two Myths about the U.S. Health Care System,2009
3. Pharmaceutical Research and Manufacturers of Americas,2008
4. Five years after To Err Is Human: What have we learnedhttp://www.commonwealthfund.org/Content/Publications/In-the-Literature/2005/May/Five-Years-After--To-Err-Is-Human---What-Have-We-Learned.aspx
5. http://www.medicalproductsdirect.com/puoxnoav40pu.html