1. El-Solh, A.A., Sikka, P., Ramadan, F., Davies, J. (2001). Etiology of pneumonia in the very elderly. American Journal of Respiratory Critical Care Medicine, 163, 645–651.
2. El-Solh, A.A., Pietrantoni, C., Bhat, A., Aquilina, A.T., Okada, M., Grover, V., Gifford, N. (2003). Microbiology of severe aspiration pneumonia in institutionalized elderly. American Journal of Respiratory Critical Care Medicine, 167, 1650–1654.
3. Fernandez-Sabe, N., Carratala, J., Roson, B., et al (2003). Community-acquired pneumonia in very elderly patients: causative organisms, clinical characteristics and outcomes. Medicine, 82, 159–169.
4. Yoshikawa, T.T. (2007). Epidemiology and special aspects of infectious diseases in aging 2nd ed. In T.T. Yoshikawa, J.G. Ouslander (Eds). Infection Management for Geriatrics in Long-term Care Facilities. pp. (15–19). New York: Information Healthcare.
5. Leinicke, T., Navitsky, R., Cameron, S., et al (1999). Fever in the elderly: how to surmount the unique diagnostic and therapeutic challenges. Emergency Medical Practices, 1, 1–24.