1. Agency for Healthcare Research and Quality 2008 Inpatient Quality Indicators Overview http://www.qualityindicators.ahrq.gov/modules/iqi_resources.aspx
2. Agency for Healthcare Research and Quality, Healthcare Cost and Utilization Project (HCUP) 2014b Hospital Market Structure Files https://www.hcup-us.ahrq.gov/toolssoftware/hms/hms.jsp