1. Centers for Disease Control. Recommended childhood immunization schedule-United States, 1997. SIMAI R Morb Mortal W4Iklv Rejp. 1997; 46:35-40.
2.
2. Centers for Disease Control. Status report on the childhood immunization initiative national, state, and urban area vaccination coverage levels among children aged 19-35 months United States, 1996. MMWR Morb Mortal TIW4' Rep. 1997;46:657-664.
3.
3. Centers for Disease Control. Vaccination cove-age by race/ethnicity and poverty level among children aged 19-35 months United States, 1996. AIIVI/R Morl) Mortal Vl Tk I Rep). 1997; 46:963-969.
4.
4. Bates AS, Fitzgerald JF, Dittus RS, WBolinskv FD. Risk factors for underimmunization in poor urban infants. JAAIA. 1994;272:1105-1110.
5.
5. Marwick C. Decision but no unanimity-on polio vaccine use. JAAIA. 1996;276:1210-1210.
6.
6. Willis E, Sherrod JL. Childhood immunizations: positions on the enhanced inactivated poliovirus vaccine and live attenuated oral polio vaccine dilemma. J Nall Med Assoc. 1997; 89:785-789.
7.
7. Freed GJL, Bordley WC, Clark S, Konrad TR. Reactions of pediatricians to a new Centers for Disease Control recommendation for universal immunization of infants with Hepatitis B vaccine. Pedialtris. 1993;91:699-702.
9. Taylor JA, Darden PM, Slora E, et al. The influence of provider behavior, parental characteristics, and a public policv initiative on the immunization status of children followed by private pediatricians: a study from pediatric research in office settings. Pediatri Cs. 1997;99:209-215.
10.
10. Szilagsi PG, Roghmann KJ, Campbell JR, et al. Immunization practices of primary care practitioners and their relation to immunization levels. Arih I'ediat Adolesc Mied. 1994;148:158-166.
11.
11. Dietz VJ, Stevenson J, Zell ER, et al. Potential impact on saccination coverage levels by administering vaccines simultaneously and reducing dropout iates. Arch Pediatr Adolesc Med. 1994; 148:943-949.
12.
12. Halperin BA, Eastwood BJ, Halperin FA. Comparison of parental and health care professional preferences for the acellular or sswhole cell pertussis vaccine. Pediaht Inaect Dis j1998; 17:103-109.