sentences:  This led to the approval for the stent to be used in Europe in April 2002.Further trials with the Cypher stent revealed that restenosis did occur in some individuals with high risk features (such as long areas of stenosis or a history of diabetes mellitus), but that the restenosis rate was significantly lower than with bare metal stents (3.2 percent compared to 35.4 percent).About a year after approval in Europe, the United States FDA approved the use of the Cypher stent as the first drug-eluting stent for use in the general population in the United States.