Richens, J; Imrie, J; Weiss, H; (2003) Human immunodeficiency virus risk: is it possible to dissuade people from having unsafe sex? Journal of the Royal Statistical Society Series A, (Statistics in Society), 166. pp. 207-215. ISSN 0964-1998 DOI: https://doi.org/10.1111/1467-985X.00268 Full text not available from this repository.