RT Journal Article SR Electronic T1 Doubts on the appropriateness of universal human papillomavirus vaccination: is evidence on public health benefits already available? JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 667 OP 667 DO 10.1136/jech.2007.073528 VO 62 IS 8 A1 M Porta A1 B González A1 S Márquez A1 L Artazcoz YR 2008 UL http://jech.bmj.com/content/62/8/667.abstract AB