Concerning the FDA and medical devices we have some 510k for class II that we would like to discontinue. The issue is that we have other medical devices that refer to the DHF/510k submissions that we would like to obsolete. It means that they share some instruments or disposables for example. My question : can we still referring to this 510K and/or DHF that have been obsoleted ? or do we need to keep the DHF open and the 510k could be inactivated ? Thanks very much