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APA Citation
Ogilvie, G., Donken, R., Pedersen, H., Bettinger, J., Goldman, R., Saewyc, E., Dobson, S., Naus, M., & Sadarangani, M. (n.d.). p821 Sexual behavior in adolescents before and after introduction of the HPV vaccination in canada. Sexually transmitted infections, 95, A345. http://access.bl.uk/ark:/81055/vdc_100137793144.0x00000f