Usuf, E., Bottomley, C., Bojang, E., Cox, I., Bojang, A., Gladstone, R., . . . Roca, A. (2019). Persistence of Nasopharyngeal Pneumococcal Vaccine Serotypes and Increase of Nonvaccine Serotypes Among Vaccinated Infants and Their Mothers 5 Years After Introduction of Pneumococcal Conjugate Vaccine 13 in The Gambia. Clin Infect Dis.

Usuf, Effua, Christian Bottomley, Ebrima Bojang, Isatou Cox, Abdoulie Bojang, Rebecca Gladstone, Beate Kampmann, Philip C. Hill, και Anna Roca. "Persistence of Nasopharyngeal Pneumococcal Vaccine Serotypes and Increase of Nonvaccine Serotypes Among Vaccinated Infants and Their Mothers 5 Years After Introduction of Pneumococcal Conjugate Vaccine 13 in The Gambia." Clin Infect Dis 2019.

Usuf, Effua, et al. "Persistence of Nasopharyngeal Pneumococcal Vaccine Serotypes and Increase of Nonvaccine Serotypes Among Vaccinated Infants and Their Mothers 5 Years After Introduction of Pneumococcal Conjugate Vaccine 13 in The Gambia." Clin Infect Dis 2019.