1. Incidence of anal epidermoid carcinoma in Sweden 1970-1984;Goldman;Acta Chir Scand,1989
2. Trends in incidence of anal cancer in Denmark;Frisch;BMJ,1993
3. M. Melbye, Cs Rabkin, M. Frisch, Rj Biggar, Changing patterns of anal cancer incidence in the USA, period 1940-89, Am J Epidemiol ((in press)).
4. 1993 revised classification system for HIV infection and expanded surveillance case definition for AIDS among adolescents and adults;Cdc;MMWR,1992
5. Anal and cervical intraepithelial neoplasia: possible parallel;Scholefield;Lancet,1989