We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleModels of excellence.AuthorsLee, P RPublicationLancet (London, England), 1994, Vol 344, Issue 8935, p1484ISSN0140-6736Publication typeJournal ArticleDOI10.1016/s0140-6736(94)90295-x