RT Journal Article SR Electronic T1 Assessment of endothelial function using plasma markers. JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 321 OP 322 DO 10.1136/hrt.78.3.321 VO 78 IS 3 A1 A. Blann A1 G. Lip YR 1997 UL http://heart.bmj.com/content/78/3/321.abstract AB