1. Cancer Statistics Review 1973–1989, National Cancer Institute;Miller,1992
2. Cancer Facts and Figures-1993;American Cancer Society,1993
3. AIDS related lymphomas: evaluation by abdominal CT;Nyberg;Radiology,1986
4. Correlates of homosexual behavior and incidence of anal cancer;Daling;JAMA,1982
5. Rectal lymphoma in homosexual men;Burkes;Arch Int Med,1986