His firm seeks to do business with the companies it covers. After the warning letter appeared on the FDA's Web site, Stryker this week took some action. The company announced a voluntary recall of popular Trident-brand hip cups manufactured in its Cork, Ireland, factory. Stryker will continue to sell identical devices made at its New Jersey plant. The company anticipates some "short-term supply disruption," but no material impact to its 2008 sales as a result of this move. "The company does not believe there is any clinical evidence to indicate that the products mentioned in the warning letter present a safety issue to patients," Stryker stressed on Tuesday. Indeed, "numerous published independent reports validate the long-term clinical performance of these products." Stryker says it has been "cooperating fully" with the FDA to resolve the situation. In fact, the company says that it has already validated its manufacturing processes in Ireland and has stepped up production at both of its facilities.