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APA Citation
Prah, P., Hickson, F., Bonell, C., McDaid, L. M., Johnson, A. M., Wayal, S., Clifton, S., Sonnenberg, P., Nardone, A., Erens, B., Copas, A. J., Riddell, J., Weatherburn, P., & Mercer, C. H. (2016). men who have sex with men in Great Britain: comparing methods and estimates from probability and convenience sample surveys. Sexually transmitted infections, 92, 455–463. http://access.bl.uk/ark:/81055/vdc_100137792946.0x00000c