1. U.S. Preventive Services Task Force. Guide to clinical preventive services, 2nd ed. Baltimore, MD: Williams & Wilkins, 1996.
2. Healthy People 2000,1990
3. Clinician’s handbook of preventive services,1998
4. HEDIS 3.0,1997
5. Putting Prevention into Practice;Gemson;Arch Intern Med,1995