20.05.2002
Sustained efficacy during the first 6 years of life of 3-component acellular pertussis vaccines administered in infancy: the Italian experience
S. Salmaso, P. Mastrantonio, A.E. Tozzi, P. Stefanelli, A. Anemona, M.L. Ciofi degli Atti, A. Giammanco, and Stage III Working Group
Pediatrics, 2001; 108: e81