21 We do not find that submission persuasive either. As at present advised, it appears to us to posit a most unlikely possibility: if only because, although the opinion of the Medical Panel is not conclusive for the purposes of the application under s 134AB, it is (as the judge observed) something to which the court might well have regard. The posited possibility also raises nice questions as to whether, in its application to a proceeding for statutory compensation, s 68(4) requires a court to accept a Medical Panel opinion as final and binding notwithstanding an earlier inconsistent curial determination under s 134AB that the worker was entitled to compensation. One answer, perhaps, is that the issue estoppel which would arise from the earlier curial determination of entitlement to compensation would so operate as to eliminate or foreclose the 'question or matter' to which s 68(4) might otherwise apply. We do not say that is necessarily so, however, and we do not find it necessary to consider the question further.