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Tyrrell DA, Bynoe ML, Hoorn B.Tyrrell DA, et al. Among authors: hoorn b.Br Med J. 1968 Mar 9;1(5592):606-10. doi: 10.1136/bmj.1.5592.606.Br Med J. 1968.PMID: 4295363Free PMC article.Clinical Trial.No abstract available.