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APA Citation
Porta, M., González, B., Márquez, S., & Artazcoz, L. (2008). doubts on the appropriateness of universal human papillomavirus vaccination: is evidence on public health benefits already available?. Journal of epidemiology and community health, 62(8), 667. http://access.bl.uk/ark:/81055/vdc_100135145138.0x000022