Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KJAER SK,Type specific persistence of high risk human papillomavirus (HPV) as indicator of high grade cervical squamous intraepithelial lesions in young women : Population based prospective follow up study,BMJ,,,2002,325,,572,https://cir.nii.ac.jp/crid/1570572701277900416,