sentences:  These coated stents were found to have a lower incidence of subacute thrombosis than bare metal stents.At approximately the same time, Cordis (a division of Johnson & Johnson) was developing the Cypher stent, a stent that would release sirolimus (a chemotherapeutic agent) over time.The first study of these individuals revealed an incredible lack of restenosis (zero percent restenosis) at six months.