Percentage of percutaneous coronary interventions using drug-eluting stents in a National Health Service setting in England—National Institute for Health and Care Excellence guidance was published in 2003 and 2008 (red arrows). DES, drug-eluting stent. Percentage of percutaneous coronary interventions using drug-eluting stents in a National Health Service setting in England—National Institute for Health and Care Excellence guidance was published in 2003 and 2008 (red arrows). DES, drug-eluting stent. Gillian Leng et al. BMJ Innov 2018;4:178-184 Copyright © BMJ Publishing Group Ltd & British Cardiovascular Society. All rights reserved.