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Keystone JS, Keystone JS, Keystone JS.Keystone JS, et al.Can Med Assoc J. 1981 Sep 1;125(5):415-6, 450.Can Med Assoc J. 1981.PMID: 7284923Free PMC article.No abstract available.
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Keystone JS, Keystone DL, Proctor EM.Keystone JS, et al. Among authors: keystone dl.Can Med Assoc J. 1980 Sep 20;123(6):512-4.Can Med Assoc J. 1980.PMID: 7437971Free PMC article.
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Keystone JS, Krajden S, Warren MR.Keystone JS, et al.Can Med Assoc J. 1978 Aug 12;119(3):241-2, 247-8.Can Med Assoc J. 1978.PMID: 679128Free PMC article.
Murdoch JK, Keystone JS.Murdoch JK, et al. Among authors: keystone js.Can Med Assoc J. 1983 Mar 1;128(5):508.Can Med Assoc J. 1983.PMID: 6600648Free PMC article.No abstract available.