1. Burden of lung disease;BTS,2006
2. Geriatric respiratory medicine;Chan;Chest,1998
3. Pneumonia in the elderly;Feldman;Med Clin North Am,2001
4. Community-acquired pneumonia in the elderly: a multivariate analysis of risk and prognostic factors;Riquelme;Am J Respir Crit Care Med,1996
5. Impact of influenza on an aging population;Peters;Ann Long Term Care,2000