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. 2016 Mar 11;5(3):e65. doi: 10.1038/cti.2016.7

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Copyright © 2016 Australasian Society for Immunology Inc.

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Correlation plots depicting post-vaccination anti-diphtheria toxin antibody titers in relation to (a) anti-tetanus toxoid antibody titers and (b) anti-pertussis toxin antibody titers, and (c) anti-tetanus toxoid antibody titers in relation to anti-pertussis toxin antibody titers at 18 months of age (Spearman's rank correlation test). A P-value⩽0.05 was regarded as being statistically significant.