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Yuen JC, Riggs OE.Yuen JC, et al. Among authors: riggs oe.South Med J. 1991 Sep;84(9):1135-7. doi: 10.1097/00007611-199109000-00019.South Med J. 1991.PMID: 1891738
Williams WC, Riggs OE.Williams WC, et al. Among authors: riggs oe.J Ark Med Soc. 1971 Dec;68(7):207-9.J Ark Med Soc. 1971.PMID: 4256877No abstract available.