Marchisio, P., Esposito, S., Schito, G. C., Marchese, A., Cavagna, R., & Principi, N. (2002). Nasopharyngeal Carriage of Streptococcus pneumoniae in Healthy Children: Implications for the Use of Heptavalent Pnemococcal Conjugate Vaccine. Centers for Disease Control and Prevention.

Marchisio, Paola, Susanna Esposito, Gian Carlo Schito, Anna Marchese, Roberta Cavagna, e Nicola Principi. Nasopharyngeal Carriage of Streptococcus Pneumoniae in Healthy Children: Implications for the Use of Heptavalent Pnemococcal Conjugate Vaccine. Centers for Disease Control and Prevention, 2002.

Marchisio, Paola, et al. Nasopharyngeal Carriage of Streptococcus Pneumoniae in Healthy Children: Implications for the Use of Heptavalent Pnemococcal Conjugate Vaccine. Centers for Disease Control and Prevention, 2002.