Cardiovascular Exercise Training Extends Influenza Vaccine Seroprotection in Sedentary Older Adults: The Immune Function Intervention Trial. - Woods, Jeffrey A.; Keylock, K. Todd; Lowder, Thomas; Vieira, Victoria J.; Zelkovich, William; Dumich, Sara; Colantuano, Kim; Lyons, Kristin; Leifheit, Kurt; Cook, Marc; Chapman-Novakofski, Karen; McAuley, Edward (Journal of the American Geriatrics Society, 2009)