title: Reply on "characteristics and survival of korean anal cancer from the Korea central cancer registry data".
authors.affiliation: Korea Colorectal Cancer Study Group (KOCCS), Seoul, Korea.
authors.forename: Hyoung-Chul
authors.initials: HC
authors.lastname: Park
authors.affiliation: Korea Colorectal Cancer Study Group (KOCCS), Seoul, Korea.
authors.forename: Bong Hwa
authors.initials: BH
authors.lastname: Lee