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Increase in unprotected anal intercourse with casual partne..:

Van de Ven, Paul ; Prestage, Garrett ; French, Judy..
Australian and New Zealand Journal of Public Health.  22 (1998)  7 - p. 814-818 , 1998
Link: https://doi.org/10.1111/j.1467-842x.1998.tb01499.x