Rijksinstituut voor Volksgezondheid en Milieu Construction of opa-positive and opa-negative strains of Neisseria meningitidis to evaluate a novel meningococcal vaccine | RIVM Jaar: 2013 Construction of opa-positive and opa-negative strains of Neisseria meningitidis to evaluate a novel meningococcal vaccine | RIVM Bron: rivm.nl Download dossier (ZIP) · JSON