Reference:
 - Author: >
    Julia Hippisley-Cox and Carol Coupland and Yana Vinogradova and John
    Robson and Rubin Minhas and Aziz Sheikh and Peter Brindle
   Title: >
    Predicting cardiovascular risk in England and Wales: prospective
    derivation and validation of QRISK2
   Journal: BMJ
   Year: 2008
   Volume: 336
   Number: 7659
   Pages: 1475-82
   DOI: 10.1136/bmj.39609.449676.25
   PMID: 18573856
   URL: http://www.bmj.com/content/336/7659/1475
   eprint: http://www.bmj.com/content/336/7659/1475.pdf%2Bhtml
