1. Starfield B. Primary care: Balancing health needs, services and technology. New York: Oxford University Press; 1998.
2. Agency for Healthcare Research and Quality. About the Patient Centered Medical Home Item Set. Rockville (MD): Agency for Healthcare Research and Quality; 2011. Document #1314.
3. World Health Organization. Primary health care. Geneva: World Health Organization; 1978.
4. Institute of Medicine. Primary care: America’s health in a new era. Washington: National Academy of Sciences; 1996.
5. White KL. Primary medical care for families–organization and evaluation. N Engl J Med. 1967;277:847–52.