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APA Citation
Hu, T., Sarpong, E., Song, Y., Done, N., liu, Q., Signorovitch, J., & Petigara, T. (n.d.). 1480. Incidence of Non-Invasive Pneumococcal Pneumonia in Children in the United States before and after Introduction Pneumococcal Conjugate Vaccines (PCV7 and PCV13) during 1998-2018. Open forum infectious diseases, 7, S741–S742. http://access.bl.uk/ark:/81055/vdc_100121926839.0x000012