RT Journal Article SR Electronic T1 Cervical cancer: the increasing incidence of adenocarcinoma and adenosquamous carcinoma in younger women JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1151 OP 1152 VO 164 IS 8 A1 Shiliang Liu A1 Robert Semenciw A1 Yang Mao YR 2001 UL http://www.cmaj.ca/content/164/8/1151.abstract