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Serotype-Specific Pneumococcal Status prior to PCV 13 Admin..:

Aleksandra Banaszkiewicz ; Brygida Targońska ; Kinga Kowalska-Duplaga...
https://www.exeley.com/exeley/journals/polish_journal_of_microbiology/65/1/pdf/10.5604_17331331.1197279.pdf.  , 2016