1. Agency for Healthcare Research and Quality 2012 National Healthcare Quality Report, 2011 Rockville, MD
2. Agency for Healthcare Research and Quality 2014a AHRQ Quality Indicators http://www.qualityindicators.ahrq.gov/
3. Agency for Healthcare Research and Quality 2014b Healthcare Cost and Utilization Project http://www.ahrq.gov/research/data/hcup/index.html
4. Agency for Healthcare Research and Quality 2014c National Quality Measures Clearinghouse http://www.qualitymeasures.ahrq.gov/
5. Trends in Emergency Department Visits for Ambulatory Care Sensitive Conditions by Elderly Nursing Home Residents, 2001 to 2010;Brownell;Journal of the American Medical Association Internal Medicine,2014