We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleHeart valve stenosis and von Willebrand's factor multimers.AuthorsO'Brien, J R; Etherington, M DPublicationLancet (London, England), 1992, Vol 340, Issue 8819, p616ISSN0140-6736Publication typeCommentaryDOI10.1016/0140-6736(92)92155-9