Effectiveness of influenza vaccination in the elderly in a community in Italy.
Crocetti, E. 1; Arniani, S. 2; Bordoni, F. 3; Maciocco, G. 3; Zappa, M. 1; Buiatti, E. 2
[Article] European Journal of Epidemiology. 17(2):163-168, 2001.

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