Author M. Gulliford J. Charlton T. Prevost H. Booth A. Fildes M. Ashworth P. Littlejohns M. Reddy O. Khan C. Rudisill Year of Publication 2017 DOI 10.1016/j.jval.2016.08.734 DOIGoogle ScholarBibTeXEndNote X3 XMLEndNote 7 XMLEndnote taggedMarcRIS