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Revista De Sanidad E Higiene Publica|March 1, 1990
[Vaccination and serologic markers of hepatitis B virus infection]F Salmeron Garcia, J M Echevarria Mayo
The Journal of Infectious Diseases|November 1, 1994
Molecular characterization of envelope antigenic variants of hepatitis B virus from SpainL A Wallace, J E Echevarria, J M Echevarria, et al.
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