1. Centers for Disease Control and Prevention. Prevention of Pneumococcal Disease: Recommendations of the Advisory Committee on Immunization Practices (ACIP). MMWR. 1997;46 (RR-8):1–24.
2. Fine MJ, Smith MA, Carson CA, et al. Efficacy of pneumococcal vaccination in adults: a meta-analysis of randomized controlled trials. Arch Intern Med. 1994;154:2666–77.
3. Centers for Disease Control and Prevention. Influenza and pneumococcal vaccination coverage levels among persons aged ≥65 years—United States, 1973–1993. MMWR. 1995;44:506–7, 513–5.
4. Gyorkos TW, Tannenbaum TN, Abrahamowicz M, et al. Evaluation of the effectiveness of immunization delivery methods. Can J Public Health. 1994;85:S14–30.
5. Fiebach N, Beckett W. Prevention of respiratory infections in adults: influenza and pneumococcal vaccines. Arch Intern Med. 1994;154:2545–57.