1. Transmission of hepatitis C virus;Riestra, S.; Suarez, A.; Rodrigo, L.;Ann Intern Med,1990
2. Preventing the spread of HIV infection;Singaratnam, A.E.; Boag, F.; Barton, S.E.; Hawkins, D.A.; Lawrence, D.A.;BMJ,1991
3. Resurgent gonorrhoea in homosexual men;Waugh, M.A.;Lancet,1991
4. Increase in unsafe homosexual behaviour;JAR, Van Den Hoek; GJP, Griensven; RA, Coutinho;Lancet,1990
5. Does rectal gonorrhoea reflect unsafe sex?;Tomnlinson, D.R.; French, P.D.; Harris, J.R.W.; Mercey, D.E.;Lancet,1991