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APA Citation
Maw, R. D., Connolly, J., Johnston, S., McKirgan, J., McNeill, J., & Russell, J. (1987). follow up study of sexually transmitted disease (STD), sexual practice and human immunodeficiency virus (HIV) serology in homosexual men attending an STD clinic.. Sexually transmitted infections, 63(4), 279–280. http://access.bl.uk/ark:/81055/vdc_100142303819.0x000002