- National Institutes of Healthwww.health.nih.gov
- U.S. Bureau of Labor Statisticswww.bls.gov
- U.S. Department of Laborwww.dol.gov
- American Health Care Associationwww.ahcancal.org
- American Staffing Associationwww.americanstaffing.net
- American Medical Associationwww.ama-assn.org
