McBean AM, Hebert PL. New estimates of influenza-related pneumonia and influenza hospitalizations among the elderly. Int J Infect Dis. 2004 Jul;8(4):227-35.
McBean AM, Hebert PL. New estimates of influenza-related pneumonia and influenza hospitalizations among the elderly. Int J Infect Dis. 2004 Jul;8(4):227-35.