sentences:  With the significantly lower restenosis rates of drug eluting stents compared to bare metal stents, the interventional cardiology community began using these stents as soon as they became available.Cordis, the manufacturer of the Cypher drug eluting stent, was not able to keep up with the demand for these stents when they first entered the market.This fueled a rationing of Cypher stents; they were used on difficult anatomy and high risk individuals.