RT Journal Article SR Electronic T1 Cluster-randomised trial of risk communication to enhance informed uptake of cervical screening JF Journal of Family Planning and Reproductive Health Care JO J Fam Plann Reprod Health Care FD British Medical Journal Publishing Group SP 67 OP 67 DO 10.1783/147118904322702144 VO 30 IS 1 A1 Laura Patterson YR 2004 UL http://jfprhc.bmj.com/content/30/1/67.3.abstract AB