Inequity of access to investigation and effect on clinical outcomes: prognostic study of coronary angiography for suspected stable angina pectoris.
Sekhri N, Timmis A, Chen R, Junghans C, Walsh N, Zaman MJ, Eldridge S, Hemingway H, Feder G.
BMJ. 2008 May 10; 336(7652):1058-61. Epub 2008 Apr 24.
[BMJ. 2008]