Prevalence of genosubtypes (PorA types) of serogroup B invasive meningococcus in the north of Spain from 2000 to 2003

1. Vicente, D.
2. Esnal, O.
3. Michaus, L.
4. López De Goicoechea, M.J.
5. Cisterna, R.
6. Pérez-Trallero, E.