Treatment of in-stent restenosis with sirolimus-eluting-stents: results from the prospective German Cypher stent registry - Möllmann, Helge; Elsässer, Albrecht; Nef, Holger M.; Schneider, Steffen; Nienaber, Christoph; Richardt, Gert; Weber, Michael; Kelm, Malte; Levenson, Benny; Bonzel, Tassilo; Tebbe, Ulrich; Sabin, Georg; et al. (Clinical research in cardiology, 2008)