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APA Citation
Hyams, C., Amin, Z., Ladhani, S., Malin, A., Maskell, N., Finn, A., & Williams, O. (n.d.). s135 The clinical impact of Streptococcus pneumoniae serotype shift to non-PCV13 vaccine serotypes. Thorax, 74, A86. http://access.bl.uk/ark:/81055/vdc_100136718483.0x00002e