RT Journal Article SR Electronic T1 A long story made too short: surrogate variables and the communication of HPV vaccine trial results JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 377 OP 378 DO 10.1136/jech.2009.090183 VO 64 IS 5 A1 Ansgar Gerhardus A1 Oliver Razum YR 2010 UL http://jech.bmj.com/content/64/5/377.abstract AB