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Armstrong D, Young LS, Meyer RD, Blevins AH.Armstrong D, et al. Among authors: young ls.Med Clin North Am. 1971 May;55(3):729-45. doi: 10.1016/s0025-7125(16)32514-7.Med Clin North Am. 1971.PMID: 4325096Review.No abstract available.