01.02.2000
Efficacy of hepatitis A vaccine in prevention of secondary hepatitis A infection: a randomised trial
L. Sagliocca, P. Amoroso, T. Stroffolini, B. Adamo, M.E. Tosti, G. Lettieri, C. Esposito, S. Buonocore, P. Pierri, A. Mele
The Lancet, 1999; 353: 1136-1139