Khattab Ahmed A, Hamm Christian W, Senges Jochen, et al. Sirolimus-eluting stent treatment for unprotected versus protected left main coronary artery disease in the widespread clinical routine: 6-month and 3-year clinical follow-up results from the prospective multi-centre German Cypher Registry. Heart 2007;93:1251–1255. This article was published with the incorrect doi: 10.1136/hrt.2007.104703. The correct doi is 10.1136/hrt.2006.104703.