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Tozzi, Alberto E; Rava, Lucilla; Ciofi degli Atti, Marta L et al. (2003) Clinical presentation of pertussis in unvaccinated and vaccinated children in the first six years of life. Pediatrics 112:1069-75
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Salmaso, S; Mastrantonio, P; Wassilak, S G et al. (1998) Persistence of protection through 33 months of age provided by immunization in infancy with two three-component acellular pertussis vaccines. Stage II Working Group. Vaccine 16:1270-5
Greco, D; Salmaso, S; Mastrantonio, P et al. (1996) A controlled trial of two acellular vaccines and one whole-cell vaccine against pertussis. Progetto Pertosse Working Group. N Engl J Med 334:341-8