CONSORT diagram for women enrolled onto the Portland Kaiser cohort in from 1989 to 1990. BL, baseline; CIN2+, cervical intraepithelial neoplasia grade 2 or more severe; CVL, cervicovaginal lavage; HPV, human papillomavirus; HSIL, high-grade squamous intraepithelial lesion; Pap, Papanicolaou.