RT Journal Article SR Electronic T1 Young women’s risk of first HPV infection was high and increased when the first male partner was sexually experienced JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 121 OP 121 DO 10.1136/ebm.13.4.121 VO 13 IS 4 YR 2008 UL http://ebm.bmj.com/content/13/4/121.abstract AB