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McLean GK, Rombeau JL, Caldwell MD, Ring EJ, Freiman DB.McLean GK, et al. Among authors: ring ej.AJR Am J Roentgenol. 1982 Dec;139(6):1129-33. doi: 10.2214/ajr.139.6.1129.AJR Am J Roentgenol. 1982.PMID: 6816032
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Zajko AB, McLean GK, Freiman DB, Oleaga JA, Ring EJ.Zajko AB, et al. Among authors: ring ej.AJR Am J Roentgenol. 1981 Oct;137(4):799-802. doi: 10.2214/ajr.137.4.799.AJR Am J Roentgenol. 1981.PMID: 6457519
McLean GK, Mackie JA, Freiman DB, Ring EJ.McLean GK, et al. Among authors: ring ej.AJR Am J Roentgenol. 1982 Apr;138(4):615-9. doi: 10.2214/ajr.138.4.615.AJR Am J Roentgenol. 1982.PMID: 6978021