Boston Scientific's success with Taxus was even more remarkable considering the problems the company experienced during its first year in the drug-coated stent market. The company recalled the product three times in 2004 after receiving complaints in June about the delivery systems doctors used to implant the stents in blood vessels. Occasionally, the balloon used to expand the stent in the blood vessel failed to deflate properly, a problem Boston Scientific eventually fixed by making changes at its manufacturing plants in Minnesota and Ireland. Despite recalling approximately 100,000 stents, the company maintained its large lead in the market.