RT Journal Article SR Electronic T1 The expert witness: the lawyer’s perspective JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 677 OP 679 DO 10.1136/hrt.2008.149732 VO 95 IS 8 A1 Adrian QC Whitfield YR 2009 UL http://heart.bmj.com/content/95/8/677.abstract AB