Author J. Cassell C. Mercer L. Sutcliffe I. Petersen A. Islam M. Brook J. Ross G. Kinghorn I. Simms G. Hughes A. Majeed J. Stephenson A. Johnson A. Hayward Year of Publication 2006 DOI 10.1136/bmj.38726.404120.7C DOIGoogle ScholarBibTeXEndNote X3 XMLEndNote 7 XMLEndnote taggedMarcRIS