1. Centers for Medicare & Medicaid Services website. Available at: http://cms.hhs.gov. Accessed June 2002.
2. American Academy of Pediatrics website. Available at: http://www.aap.org. Accessed June 2002.
3. California HealthCare Foundation website. Available at: http://www.chcf.org. Accessed July 2002.
4. Pacific Business Group on Health website. Available at: http://www.pbgh.org/data.asp. Accessed July 2002.
5. The Leapfrog Group website. Available at: http://www.leapfroggroup.org. Accessed June 2002.