RT Journal Article SR Electronic T1 HPV vaccines JF Journal of Family Planning and Reproductive Health Care JO J Fam Plann Reprod Health Care FD British Medical Journal Publishing Group SP 81 OP 81 DO 10.1783/0000000052972870 VO 31 IS 1 A1 Greenwood, Katherine YR 2005 UL http://jfprhc.bmj.com/content/31/1/81.1.abstract AB