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Khattab AA, Hamm CW, Senges S, et al. Sirolimus-eluting stent treatment for unprotected versus protected left main coronary artery disease in widespread clinical routine: 6-month and 3-year clinical follow-up results from the prospective multicentre German Cypher Registry. Heart 2007;93:1251–5. This article was printed with an incorrect DOI. The DOI should be 10.1136/hrt.2006.104703.