- American Health Care Associationwww.ahcancal.org
- Mayo Clinicwww.mayoclinic.org
- U.S. Department of Health & Human Serviceswww.hhs.gov
- Centers for Disease Control and Preventionwww.cdc.gov
- National Institutes of Healthwww.health.nih.gov
- The Agency for Healthcare Research and Qualitywww.ahrq.gov
