Distribution of anal cytological abnormalities among 299 HIV-uninfected MSM. Anal samples, collected with a Dracon swab and stored in PreservCyt, were used for liquid-based cytology to evaluate the presence of cytological abnormalities. These were classified following the Bethesda 2001 guidelines.
Donà et al. BMC Cancer 2012 12:476 doi:10.1186/1471-2407-12-476