1. 1. Schappert SM: Office Visits for Otitis Media: United States 19752000. Hyattsville Md. National Center for Health Statistics. 1992. Data from Vital and Health Statistics of the Centers for Disease Control No. 214 pp 1-18.
2. 2. Paradise JL Rockette JE Colborn K et al. Otitis media in 2253 Pittsburgharea infants: prevalence and risk factors during the first two years of life. Pediatrics. 1997;99:318-333.
3. 3. Dutch College of General Practitioners: NGH Standard Acute Otitis Media June 1993.
4. 4. DeNeeling AJ Van Leeuwen WJ Van Klingeren B et al. Epidemiology of Streptococcus pneumoniae in The Netherlands. Abstracts of the 36th Interscience Conference on Antimicrobial Agents and Chemotherapy New Orleans LA. September 1996. Abstract C57.
5. 5. Black S Shinefield H Fireman B et al. Efficacy safety and immunogenicity of heptavalent pneumococcal conjugate vaccine in children. Northern California Kaiser Permanent Vaccine Study Group. Pediatr Infect Dis J. 2000;19:187-195.